The probability that I can eat coins is 1/60.
Afterwards, "I" learned that the reason why "I" could eat coins was because my grandmother did something. On this premise, ask? And simply imagine and analyze it.
Grandma's trick: Mark the jiaozi with coins and put them in my bowl.
The probability that I eat the first jiaozi with coins in it is115.
(3) Or four people eat 60 jiaozi, and only 1 jiaozi has coins. Please design a method to make both mom and grandma eat coins. ? This question is incomplete.
8. There are six cards in two bags, namely 0, 1, 2, 3, 4 and 5. Take a card from each bag and find out the probability that the sum of two numbers is equal to 6. Now Obana Xiaojing gives the following two different answers:
Xiaohua's solution to the sum of two numbers * * * has eleven different results: 0, 1, 2, ... 10, so the probability is.
Solution of small crystal: take a card from each bag. There are 6*2 ways to take * *, among which there are 5 ways to take * * * when the sum is 6: (1, 5), (2,4) (3,3) (4,2) (5, 1).
Xiao Jing's solution is correct. There are many ways to solve the same sum in Xiaohua's solution, and it can't be counted as 1 time.
9. A school has two restaurants, A and B. Students A, B and C each choose one at random:
(1) Find the probability that students A, B and C eat in the same restaurant;
Party A, Party B and Party C:
A: A, B: C.
A: A, C and B: B.
A: B, C: A..
A: C: B: A and B.
A: B: A and C.
A: A: B: B, C.
A: B: A, B and C.
The probability that students A, B and C eat in the same restaurant is 2/8 = 1/4.
(2) The probability that at least one of the three students A, B and C eats in B restaurant is 7/8.
1. If you randomly draw one card from a deck of playing cards, the same possibility is ............................... (4).
A. king and spades B. king and 10 C. 10 and hearts D. hearts and clubs
A bag contains eight red balls, each of which is the same except the color. When a person touches the ball, then ... (3)
A. probably touched the red ball. B.may have touched the red ball.
C. you must touch the red ball. You are unlikely to touch the red ball.
3. Choose a card from a deck of playing cards (except the king of size), and the unlikely card is ...................... (1).
A. hearts 5b.5c spades d clubs 5 or 8.
4. Among the following events, the uncertain event is ............................................ (III).
A. In the air, gasoline burns in case of fire. B.if you throw a stone upward, it will fall to the ground.
C.it will be sunny next Saturday. D if any number is multiplied by zero, the product is still zero.
Bag A contains two red balls and eight white balls, while bag B contains eight red balls and two white balls. If you want to take a white ball out of two pockets, you have a better chance of success (A).
A.A package B package c A and B package are the same D I'm not sure.