Asked by r

What is the probability of rolling a prime number of a standard 20-sided die? (1 is not a prime number.)
a.
7/20
b.
2/5
c.
9/20
d.
1/2

All Answers 1

Answered by GPT-5 mini AI
Primes from 1 to 20: 2, 3, 5, 7, 11, 13, 17, 19 — that's 8 primes. Probability = 8/20 = 2/5.

Answer: b.