Question

Sergio, Kim, Jim, Maria, Sarah, Larry, and Tyrone have all been invited to a dinner party. They arrive randomly and each person arrives at a different time.

a. In how many ways can they​ arrive?
 
b. In how many ways can Sergio
arrive first and
Tyrone
​last?
 
c. Find the probability that
Sergio
will arrive first and
Tyrone
last

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Basic Probability

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