10 lucky spectators will participate in a lucky draw. The lucky draw consisted of 10 ping-pong balls of the same size in a box, and each ball had a number of prizes written on it.
2024-09-11 01:22
[The first question is: 10 lucky viewers will participate in a lucky draw.] The lucky draw consisted of 10 ping-pong balls of the same size placed in a box. Each ball had a number of prizes written on it. One first prize, two second prizes, three third prizes, and four encouragement prizes.
1. What was the probability of the first audience member winning the first prize?
2. If the first audience member drew the third prize (the ball he drew was not put back into the box), what was the probability of the second audience member drawing the first prize?
3. If the second audience member drew the encouragement prize (the ball he drew was not put back into the box), what was the probability of the third audience member drawing the first prize?
The second question was: Little Light bought 20 100-cent and 80-cent stamps for a total of 19 yuan. How many 100-cent stamps and 80-cent stamps did Little Light buy?
The third question: Mom bought a fountain pen and three pens for 12.8 yuan. The unit price of a fountain pen was five times that of a pencil. How much is the unit price of a pen and pencil?
(Speed!)
1 answer
2024-09-11 03:13
If 10 lucky spectators participate in a lucky draw, each ball has a prize number written on it, then the fairness of the lucky draw can be guaranteed in the following ways: 1. Randomly divide the 10 ping-pong balls into two groups of five balls each. Then, the two groups of ping-pong balls were placed in two boxes. The five balls in one group were used as prizes, and the five balls in the other group were used as consolation prizes. 2 Let the participants choose the prize they want to win during the draw. If the participant made the wrong choice, the consolation prize would be awarded. If the participant chooses the right prize, the prize will be distributed according to the number of prizes written on each ball. In this way, all the prizes could be distributed fairly and no one would miss the prize because they chose the wrong ball. This way, the lottery would maintain fairness and everyone would have a chance to win a prize.
A unit held a lucky draw, and every employee had one chance to draw. There were six identical ping pong balls in the lottery box, three of which were marked with the number 1, two, and three.
1 answer
2024-09-08 17:25
The three balls with the number 1 on them were marked as the first prize, the two balls with the number 2 on them were marked as the second prize, the two balls with the number 3 on them were marked as the third prize, and the three balls without the number 1 on them were marked as the fourth prize, the fifth prize or the sixth prize.
Each employee has a 1/6 chance of winning the first prize, 2/6 chance of winning the second prize, 3/6 chance of winning the third prize, and 1-1/6 chance of winning the fourth, fifth or sixth prize. Therefore, the probability of each ping pong ball appearing in the lottery box was:
First prize:3/6 × 1/3 = 1/6
Second prize:2/6 × 2/3 = 4/18
Third prize:3/6 × 1/3 = 1/6
Fourth prize:1/6 × 1/3 = 1/18
Fifth prize:2/6 × 1/3 = 4/18
Sixth prize:1/6 × 1/3 = 1/18
Because every employee had one chance to draw the prize, they could not win the prize twice. Therefore, the first prize has a probability of 1/6, the second prize has a probability of 4/18, the third prize has a probability of 1/6, the fourth prize has a probability of 1/18, the fifth prize has a probability of 1/18, and the sixth prize has a probability of 1/18.
The opening of the year to celebrate the lucky draw
1 answer
2024-10-19 03:27
The " opening of the year to celebrate the lucky draw " was a creative idea for online writing. It usually referred to setting up a lucky draw at the beginning of the novel to allow readers to participate in it, increasing the reader's sense of participation and interaction.
In this kind of creativity, the author could set up various awards, such as cash red packets, physical novels, authors 'signatures, etc., to attract readers to participate. At the same time, the author could also introduce the background, characters, plot, etc. of the novel to the readers through the lottery, so that the readers could better understand the world and story of the novel.
It should be noted that when setting up the lucky draw, the author must abide by the relevant laws and regulations. They must not set up illegal prizes. At the same time, they must also pay attention to protecting the privacy and personal information of the readers.
What kind of lucky draw novels could the system recommend?
1 answer
2024-08-19 06:12
- City System Lottery
- The God of Tycoons started from the system lottery.
- The system took me to catch demons.
- My system is not working
- The system hugged my thigh tightly
- I have a worker system
- Spirit Lottery System
- Douluo: My Lottery System
- [Zhu Tian: Starting from Super God, Original God Lottery]
- City's Greatest God Tycoon System
I hope you like my recommendation. Muah ~
What kind of lucky draw novels were recommended on the leaderboard?
1 answer
2024-07-16 15:45
😋I recommend the following lucky draw novels to you: Battle Break: A Fallen Heart Flame at the Beginning, The Strongest Space-Time Villain, The Strongest Red Envelope in the World, Douluo: Blessed by the Gods, The Goddess Becomes Stronger by Patting, Hong Kong: A Candlelight Night Tour at the Beginning, I Draw My Sword in Douluo and Become a God, Naruto: I Get a Celestial Body by Kryptonizing Gold at the Beginning, The Substitute Messenger of the Pirate World, The Heavenly Lottery: Duan Yu's Peak Internal Strength at the Beginning, and Kogyo's Card Drawing Ninja. I hope you like my recommendation.😗
I saw a lucky draw in the reading section of the China Unicorn app. How can I participate?
1 answer
2024-09-18 14:31
If you want to participate in the lucky draw in the reading area of the China unicom APP, you can follow the following steps:
1. Open the WeChat APP and enter the reading area;
2. click on the "welfare activity" or "lucky draw activity" button at the top of the page to enter the activity page;
3. You can see the lucky draw prompt on the event page and click on the "participate in the lucky draw" in the prompt;
4. Enter relevant information such as name, mobile number, reading time, etc. according to the page prompt;
5. After confirming the information, click the "Submit" button to participate in the lucky draw. If you win the prize, you will receive a winning reminder email or text message.
Please note that the specific rules and prizes of the lucky draw may change at any time. Please read the instructions on the event page carefully before participating.
How to use java-based technology to achieve a lucky draw system
1 answer
2024-09-11 21:18
To implement the lucky draw system using the java-based technology, you can consider the following steps:
1. Design the lottery rules: determine the lottery rules such as the first prize, the second prize, the third prize, etc. Each prize has a different prize and each prize has a different number limit.
2. Create a lucky draw page: Write a lucky draw page using the combination of browser, browser, and javelin. The user can click a button or type in a text box to draw a prize.
3. Realization of the lottery algorithm: Use the Java language to implement the lottery algorithm, such as using a loop to draw or using regular expressions to match the text entered by the user.
4. Store the lottery results: Store the results of each lottery in the database. For example, use the Mystical database to store the lottery results. Each prize has a different record and each user has a different record.
5. Realizing the payment interface: In order to allow the user to participate in the lucky draw, a payment interface is required. The user can click the "Pay" button on the lucky draw page to pay.
6. Send payment information: After the user completes the payment, the payment information needs to be sent to the backstage for processing. For example, the backstage can save the user information into the database, calculate the lottery result, and send the winning information to the user.
7. Abnormality handling: Some abnormalities may occur during the lottery draw process. For example, the text entered by the user does not conform to the lottery rules. The abnormalities need to be handled to ensure that the lottery draw can proceed normally.
8. System maintenance: During the lottery event, the system needs to be maintained, such as updating the lottery rules, sending the winning information, and processing user feedback.
The above is a rough implementation of the lucky draw system with the steps of the implementation of the specific details need to be adjusted according to actual needs.
Please recommend some lucky draw novels set by the city system.
1 answer
2024-08-23 18:15
😋I recommend the following urban system lottery novels to you:
1. "The God of Tycoons Begins from the System Lottery": The male protagonist obtains the God of Tycoons System and begins a wild journey of life.
2. "Happiness Lottery": The male protagonist has a happiness system and can draw things from all over the world, including animals, beautiful women, weapons, and so on.
3. [Supreme Lottery System: The male protagonist accidentally obtained the lottery system and drew all the way to the peak of his life.]
4. "Everything Begins from the God Tycoon System": The male protagonist gets the God Tycoon System. The starting price is 1 million yuan, and the 10 times cash back. Everything begins from then on.
5. "God-level Wealth Spreading System": The male protagonist has completed the mission of distributing wealth and will be rewarded with ten lucky draws. The prizes include high-tech bodyguards, 10 billion yuan, and so on.
6. [The City's Greatest God Tycoon System: The male protagonist obtained the Greatest God Tycoon System and began to squander brainlessly.]
7. [Super Lottery System of the Godly Tycoons: The male protagonist accidentally obtained the lottery system and drew all kinds of things along the way.]
8. "Invincible Lottery System": The male protagonist gets the Invincible Lottery System and starts to play with the flowers.
9. "Godly City Player": The male protagonist receives the lottery system, skill card, character card, and plays life in the city.
10. "City System Lottery": The male protagonist has obtained a magical lottery system. He can draw all kinds of prizes, including the library system, the red envelope system, and so on.
11. "I Have a Super Lottery System": The male protagonist accidentally obtained the Super Lottery System, and his life changed inconceivably from then on.
12. [Reward System at the beginning of the game: The male protagonist wakes up and unexpectedly obtains the reward system, opening up unlimited possibilities in life.]
13. "The Strongest Red Envelope in the World": The male protagonist can snatch red packets and draw a lucky draw. He can snatch and draw red packets at will and get a lot of rewards.
I hope you like this fairy's recommendation. Muah ~😗
Which main characters in the novels could participate in the lucky draw? Were Xiao Yan and Inuyasha among them?
1 answer
2024-09-15 06:59
I recommend to you 'The Great Starting Point of the Ten Thousand Worlds' this novel,'The Heavens are Limitless'. The main character is Ye Shu. In the plot of the novel, there is a chance for transmigrators to draw a prize for rewards. Xiao Yan, Inuyasha, and other transmigrators will also appear. If you like stories where the main character is a transmigrator, this novel will be very suitable for you ~ I hope you like this fairy's recommendation.😗
How lucky is the plot development in the novel 'How Lucky'?
2 answers
2024-10-04 04:55
It's quite fortunate and engaging. The plot has unexpected twists and turns that keep you hooked.
Are there any good animated movies to recommend? Similar to " Unexpected Lucky Draw " and " Seconds 5 "
1 answer
2024-09-20 18:42
The recommendations for good animated films like " The Lucky Draw " and " Seconds 5 " are as follows:
1 " Valley of the Wind ": This is a classic animated film directed by Hayao Miyazaki that tells the story of protecting the environment.
2 " The Goldfish on the Cliff ": This is an animated film directed by Makoto Shinkai, which tells the love story between a pair of goldfish.
3 "Your Name": This was an animated film directed by Makoto Shinkai. It told the story of two young people meeting across time and space.
4. The Mind Squad: This is an animated film directed by Disney-based film about the struggle between the three departments of the human brain: "emotion","rationality" and "reality".
5 Zootaboo: This is an animated film directed by Disney-based film about the love story between Judy the Rabbit and Nick the Fox.
All of the above were excellent animated films worth watching.
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