Question

A bag contains 120 balls. The ratio of red to blue balls is 10:2

Find how many red and blue balls there are

Answer 1

100 red balls and 20 blue balls.

Explanation:

So to find out what you need to multiply the ratio by to get the answer, you add 10 and 2. That's 12. 120/12 is 10. 10:2 times 10 = 100: 20, so there are 100 red balls and 20 blue balls.