prep ds raffle

suman_wu

did one of the 3 members of a certain team sell at least 2 raffle tickets yesterday?

1: the 3 members sold a total of 6 raffle tickets yesterday.

2: no 2 of the members sold the same number of raffle tickets yesterday.

OA: D

why?

suman_wu

有老外这么回答：

1) Since the average is 2, at least one number has to be >=2 -> SUFF
2) In the worst case scenario we'd have : 0+1+2 (no repeats) -> SUFF

看来题目的意思是：3个人中，是否有一个人至少卖出2张票？

数学的问题还是“看不懂题目”啊。

展颜

没有其他条件了?

1) 3个人总共售出6张pp, 可以是一个人售出6张吧?

2)可以

jessica豆豆冰

Mark一下！