Probilty of number is a multiple of 5

Question

The number 1 to 30 are written on seperate cards. What is the probability that the number is multiple of 5?

Answer 1

For these types of problems you have to divide the number of possible successes by the total number of possible outcomes.

We have 30 possible outcomes (1-30)

We have 6 possible successes, the multiples of 5 (5,10,15,20,25,30)

If we divide 6/30 we get the probability that a random number pulled is a multiple of 5