A machine shop has 95 drill presses and other machines in constant use. The prob

Question

A machine shop has 95 drill presses and other machines in constant use. The probability that a machine will become inoperative during a given day is 0.007. During some days no machines are inoperative, but during some days, one, two, three or more are broken down. What is the probability that fewer than four machines will be inoperative during a particular day?
A) 0.8788 B) 0.6501 C) 0.7196 D) 0.9952 A machine shop has 95 drill presses and other machines in constant use. The probability that a machine will become inoperative during a given day is 0.007. During some days no machines are inoperative, but during some days, one, two, three or more are broken down. What is the probability that fewer than four machines will be inoperative during a particular day?
A) 0.8788 B) 0.6501 C) 0.7196 D) 0.9952 A machine shop has 95 drill presses and other machines in constant use. The probability that a machine will become inoperative during a given day is 0.007. During some days no machines are inoperative, but during some days, one, two, three or more are broken down. What is the probability that fewer than four machines will be inoperative during a particular day?
A) 0.8788 B) 0.6501 C) 0.7196 D) 0.9952

Explanation / Answer

X - no of machines becoming inoperative is binomial with p = 0.007

n = 95

Reqd Prob = P(X<4)

= 0.9953

Hence 4th option is right.

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