Probability.

BITSAT 2015 Sample Questions › Algebra questions › Probability.

$Q:$\Rightarrow$ There are 4 machines & it is known that exactly 2 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 2 tests are needed is:\\\\ (A) 1/3 (B) 1/6 (C) 1/2 (D) 1/4

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Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2011-01-07 04:58:26

1/3

becuse it can be identified...by either whn u fine both faulty machines or both working machines

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