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

MCQOPTIONS

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

Discussion

No Comment Found

Related MCQs

A natural number is selected at random from the set x = { x : 1 x 100 }. The probability that the number satisfies the inequality x<sup>2</sup> - 13x 30 is ?
If the integer m and n are chosen at random between 1 and 100, then the probability that a number of the from 7<sup>m</sup> + 7<sup>n</sup> is divisible by 5 equals ?
The letters B, G, I, N, R are rearranged to form the word 'BRING'. Find its probability ?
The probability that a marksman will hit a target is given as 1/5. Then his probability of at least one hit in 10 shots, is ?
One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card ?
The probability that a person will hit a target in shooting practice is 0.3 . If he shoots 10 times. Then the probability of his shooting the target is ?
A single letter is selected at random from the word <b>'PROBABILITY' </b>. The probability that it is a vowel, is ?
<p>Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is: </p>
<p>One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen and King only)?</p>
<p>Two dice are tossed. The probability that the total score is a prime number is: </p>