choose a number 1 to 100. What is the probability that the number is not a multiple of 5?

Answer 1

First you have to determine how many multiples of 5 there are between 1 and 100.

5, 10 , 15, 20 , 25... etc.

subtract that number from 100 and that will give you how many are not multiples of 5.

Put that answer/100 to get the probability.

Answer 2

0.86