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In a workshop, there are five machines a...

In a workshop, there are five machines and the probability of any one of them to be out of service on a day is `(1)/(4)`. If the probability that at most two machines will be out of service on the same day is `((3)/(4))^(3)k` then k is equal to :

A

`(17)/(2)`

B

4

C

`(17)/(4)`

D

`(17)/(8)`

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The correct Answer is:
D
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