Question

Question 2 0 out of 10 points Twenty-five percent of all telephones of a certain type are submitted for service while under warranty. Of these, 60% can be repaired whereas the other 40% must be replaced with new units. If purchases ten of these telephones, what is the probability that exactly two will end up being replaced under warranty? a company

Answer 1

P(being replaced under warranty) = P(being replaced under warranty | submitted for service while under warranty) * P(submitted for service while under warranty)

                                              = 0.4 * 0.25

                                              = 0.1

n = 10

This is a binomial distribution, with n = 10 and p = 0.1

P(X = x) = 10Cx * 0.1^x * (1 - 0.1)^10-x

P(X = 2) = 10C2 * 0.1² * 0.9⁸ = 0.1937