A prime number number less than 50 is randomly picked, what is probability that one of its digit wil

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11 Dec 2018 Probability

A prime number number less than 50 is randomly picked, what is probability that one of its digit will be 1?

OPtion

1) 1/4
2) 5/16
3) 5/14
4) 3/7
5) 2/5
6) 1/3
7) 7/15
8) 7/13
9) 6/13
10) None of these

Solution

Total number of prime numbers less than 50 = 15 => 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
Number of positive outcomes i.e. number where at least one of its digit is 1 = 6

Probability = 6/15 = 2/5

Correct Option: 5 Best Solution (0)