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

Answer 1

1/3

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The prime numbers between 1 and 50 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
Total number of primes is 15, numbers containing digit 1 is 5, so the probability is 5/15=1/3

Comments

There are 6 numbers that have a digit 1, so it's 2/5 or 40%.

Answer 2

50%
.
The prime numbers are 1, 2, 3, 5, 7, 11, 13, 19, 23, 31, 37, 41, 43 and 47. =14x
Of these 1, 11, 13, 17, 19, 31 and 41 have 1 as digit. = 7x
Thus 7/14 = 50%