单选题
A certain club has 10 members, includ...
发布于 2022-03-03 17:21:35
A certain club has 10 members, including Harry. One of the 10 members is
to be chosen at random to be the president, one of the remaining 9
members is to be chosen at random to be the secretary, and one of the
remaining 8 members is to be chosen at random to be the treasurer. What
is the probability that Harry will be either the member chosen to be the
secretary or the member chosen to be the treasurer?
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