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Probability 10 Online
OpenStudy (anonymous):

Martha, Lee, Nancy, Paul and Arando have all been invited to a dinner party. They arrive randomly an each person arrives at a different time.

OpenStudy (anonymous):

In how many ways can they arrive? 5! = 120 right

OpenStudy (anonymous):

In how many ways can Martha arrive first and Armando last? Help with this one, please

OpenStudy (anonymous):

I was thinking 3*2*1=6

OpenStudy (anonymous):

3! is correct

OpenStudy (anonymous):

Cuz Martha and Armando must be first and last

OpenStudy (anonymous):

Soooo Only 3 of the guys can be "moved" around

OpenStudy (anonymous):

I was thinking that, but then I thought: M * 4 * 3 * 2 * A That would give 24

OpenStudy (anonymous):

Nope that is incorrect logic

OpenStudy (anonymous):

Ok, just making sure, thx. Can you help w/ another one?

OpenStudy (anonymous):

Umm ya If i can be of assistance

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