The Magazine Mass Marketing Company has received 15 entries in its latest sweepstakes. They know that the probability of receiving a magazine subscription order with an entry form is 0.6 . What is the probability that no less than 4 of the entry forms will include an order? Round your answer to four decimal places.
Binomial distribution: P(X) = nCx px qn-x
Number of entries, n = 15
P(order), p = 0.6
q = 1 - p = 0.4
P(no less than 4 of the entry forms will include an order) = P(X 4)
= 1 - P(X < 4)
= 1 - [P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)]
= 1 - (0.415 + 15x0.6x0.414 + 15C2x0.62x0.613 + 15C3x0.63x0.412)
= 1 - 0.0019
= 0.9981
The Magazine Mass Marketing Company has received 15 entries in its latest sweepstakes. They know that...
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