Hazel had 90 crayons.
45 of them were grey crayons and the rest were silver crayons. After she had given away some grey crayons, the ratio of the number of grey crayons to the number of silver crayons became 5 : 6. How many crayons did she have in the end?
| |
Grey |
Silver |
Total |
| Before |
4x6 =
24 u |
1x6 =
6 u |
5x6 =
30 u |
| Change |
- 19 u |
|
|
| After |
5 u |
6 u |
11 u |
The number of silver crayons remained unchanged.
LCM of 1 and 6 = 6
Total number of crayons at first = 30 u
30 u = 90
1 u = 90 ÷ 30 = 3
Number of crayons that Hazel had in the end
= 5 u + 6 u
= 11 u
= 11 x 3
= 33
Answer(s):33
