Question

A fair 10 sided dice, with faces numbered 1-10, is rolled once. What is the probability that the number rolled will be prime? Express your answer as a common fraction.

Answer 1

In numbers 1 through 10, there are 4 primes. So, the fraction would be:

`(4)/(10)`

This can be simplified to:

`(2)/(5)`

That's your answer!