Question 4 (1) 40 (2) In April, because the probability is 3\20, I guess it is 3.8. 10 for the second, third and fourth times, because the probability is 1\8, which is the second highest.

The fifth question will not. Xiaoming's score is: (1 minus 1/2 cubic meters) times 5=35/8, while Xiaohong's score is: 1/8 times10 =18, which is lower than Xiaoming's.

Question 6 (1)3\20 (2) 1\20

Question 7 (1)1\ 601\ 60 (2)1\15 (don't mess around -) (3) 1 \ 2 (that's a question for mom. Otherwise, I won't. How can two people eat a coin ... and split it in half? Mom and grandma eat the same jiaozi? )

The eighth question Xiaohua 1 \ 1/small crystal 5\62 small crystal pair Because Xiaohua's method omits some cases, such as adding up to four, there are three cases (1,3)(2, 2)(3,1).

Question 9 (1)1\ 8 (2)1-1\ 8 = 7 \ 8 (This is an indirect method. 1\8 is the probability that they are in Restaurant A, that is, no one is in Restaurant B, then the probability that at least one person is in Restaurant B can be obtained by subtracting this probability. )