SOLUTION: Seven girls and six boys walk into a video store at the same time. There are five salespeople available to help them. Find the probability that the salespeople will first help the

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Question 185237This question is from textbook
: Seven girls and six boys walk into a video store at the same time. There are five salespeople available to help them. Find the probability that the salespeople will first help the given numbers of girl and boys.
P(all girls or all boys)
This question is from textbook

Answer by Edwin McCravy(20086) About Me  (Show Source):
You can put this solution on YOUR website!
Seven girls and six boys walk into a video store at the same time. There are five salespeople available to help them. Find the probability that the salespeople will first help the given numbers of girl and boys.
Choosing all girls and choosing all boys are mutually exclusive
events because if you choose all girls you did not choose all boys,
Therefore in this problem, "OR" means "PLUS"

P(all girls OR all boys) =

P(all girls) + P(all boys) =

%287C5%29%2F%2813C5%29+%2B+%286C5%29%2F%2813C5%29

21%2F1287+%2B+6%2F1287

27%2F1287

3%2F142

Edwin