A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is `1/5` (b) `3/5` (c) `2/5` (d) `4/5`

Explanation

Given:

The prime number between `50` and `100` are `53,59,61,67,71,73,79,83,89,97`

The probability not getting prime number`=1-10/50`

`= 4/5`

So correct option is `(d)`.