# Statistics

there is a 1/5 (.20) probability that one type of appliance will break with in two years. find the probability that 4 out 15 such appliances willl break within that time period

1. 👍 0
2. 👎 0
3. 👁 120
1. Try the binomial probability formula:

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

n = 15
x = 4
p = .20
q = 1 - p = .80

Substitute the values into the formula and calculate your probability.

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2. 👎 0

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