Question

A number is chosen at random from 1 to 10. What is the probability of selecting a multiple of 3.

Answer 1

The multiples of 3 in that case are 3, 6, and 9
so the probability is 3/10

Answer 2

There are ten numbers from 1-10

If there are ten numbers from 1-10, then there is a $\frac{1}{10}$ of a single random number being chosen.

There are three multiples of three (including 3): 3, 6, and 9

So if there are three multiples of three, its probability is $\frac{3}{10}$ or 3:10

The answer of choosing a multiple of three is 3:10