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Among 6 electrical components exactly one is known not to function properly. If 4 components are...

Among 6 electrical components exactly one is known not to function properly. If 4 components are selected randomly, find the probability that exactly one does not function properly.

A. 0.6667

B. 0.5000

C. 0.5787

D. 0.8333

E. 0.3333

F. None of the above.

Please explain answer.

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Answer #1

total = 6

5 non-defective, 1- defective

4 are selected

the probability that exactly one does not function properly

= 5C3 * 1C1 / 6C4

= 10/15

= 2/3

=0.66666

A) 0.6667 is correct

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