In a workshop,

Question:

In a workshop, there are five machines and the probability of any one of them to be out of

service on a day is $\frac{1}{4}$. If the probability that at most two machines will be out of service on the same day is $\left(\frac{3}{4}\right)^{3} \mathrm{k}$, then $\mathrm{k}$ is equal to :

  1. $\frac{17}{2}$

  2. 4

  3. $\frac{17}{8}$

  4. $\frac{17}{4}$


Correct Option: , 3

Solution:

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