There are four machine and it is know that exactly two of them are fau – McqOptions

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1.	There are four machine and it is know that exactly two of them are faulty, They are tested. One by one in a random order till both the faulty machines are identified. Then the probability that only two tests are needed is ?
A.	1/3
B.	1/6
C.	1/2
D.	1/4
Answer» C. 1/2

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