[問題]GWD18-13

[balanana]

Q13:
Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences. If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?
(1) None of the five days was chosen by more than 5 parents.
(2) More parents chose Monday than Wednesday.

Ans: A

可否請教這題的作法,我的答案是B
thanks~

[lance921]

這五天沒有一天 可以讓超過五位父母參加
所以最差的狀況
MON ：5
TUE：4 （more parents chose Monday than Tuesday）
WED：5
THU：5
FRI： 1
所以A條件成立