Question

If you randomly pick an integer between 1 and 25, inclusive, what is the probability that it is both odd and

prime?

Answer 1

The first 25 prime numbers (all the prime numbers less than 100) are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 (sequence A000040 in the OEIS).

Explanation:

Answer 2

Answer: 8/25

Explanation:

The prime numbers between 1 and 25 inclusive are 2, 3, 5, 7, 11, 13, 17, 19, 23.

8/25 are both prime and odd, so the probability would be 8/25.