SOLUTION: Jean is visiting her grandparents in Houston for 7 days. She wants to arrange a lunch with friends. If she picks a day at random, there is a 30% chance that all of her friends will

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Question 1088101: Jean is visiting her grandparents in Houston for 7 days. She wants to arrange a lunch with friends. If she picks a day at random, there is a 30% chance that all of her friends will be available to meet for lunch. What is the probability that all her friends are available to meet for lunch on 4 different days?
a. 9.7%
b. 22.7%
c. 2.3%
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
it is 7C4(0.3)^4*(0.7)^3
=35*0.0081*0.343
=0.097
9.7%
A