Homework Help: Statistics

Posted by Puffy on Tuesday, September 25, 2012 at 12:51am.

The probability that a parent will visit a restaurant after kids game is know to be .68 and assumed the same for all parents. Assuming customer visits are independent and identical, determine the probability that 5 of 7 parents selected at random visit the restaurant. Calculator only. Need help understanding how to set this up.

Statistics - MathGuru, Tuesday, September 25, 2012 at 6:36pm
Formula:

P(x) = (nCx)(p^x)[q^(n-x)]

n = 7
x = 5
p = .68
q = 1 - p = .32

Substitute into the formula and calculate.

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