SOLUTION: An airplane has 30 seats but some people might not show up for the flight, so they sold 32 tickets. Each person is individual so if they dont show up, it doesnt effect anyone else

Question 23730: An airplane has 30 seats but some people might not show up for the flight, so they sold 32 tickets. Each person is individual so if they dont show up, it doesnt effect anyone else. Each person has a probability of .9 of showing up and theres a .1 chance of not showing up. Whats the probablitity of more than 30 people showing up?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
It's a binomial problem with n=32, p=0.9.
You want the probability the number of
successes (people showing up) is greater
than 30. There are several ways to get
this answer, depending on the techniques
you have studied.
If you have a TI-83 calculator use:
1-binomcdf(32,0.9,30)= 0.156 = 15.6%
Cheers,
Stan H.
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