Question

Kim has 140 marbles. Fifty marbles are blue and the rest are red. Which of the following could be a way to express Kim's ratio of red marbles to blue marbles?

A 9 to 5
B 140:50
C 9 to 14
D 50: 90

Answer 1

A

Explanation:

140 marbles in total.

50 blue.

the rest = 140 - 50 = 90 red.

so the ratio of red to blue marbles is

90 : 50 = 9 : 5