Party A and Party B need to be on duty for four days from Monday to Thursday, two days each. If the specific arrangement is decided by drawing lots, there is no possibility that the same person will b

Party A and Party B need to be on duty for four days from Monday to Thursday, two days each. If the specific arrangement is decided by drawing lots, there is no possibility that the same person will be on duty continuously.

Test analysis: the situation of a shift is: (Monday, Tuesday), (Monday, Wednesday), (Monday, Thursday),

(Tuesday, Wednesday), (Tuesday, Thursday), (Wednesday, Thursday), * * Among them, (Monday and Wednesday),

(Tuesday, Thursday) shows that the same person is not on duty continuously, so the required probability is.

Comments: To find the probability of classical probability, we can only determine the number and total number of required events, and then find out their proportions.