Ivory had 120 crayons.
78 of them were white crayons and the rest were blue crayons. After she had given away some white crayons, the ratio of the number of white crayons to the number of blue crayons became 3 : 5. How many crayons did she have in the end?
| |
White |
Blue |
Total |
| Before |
7x5 =
35 u |
1x5 =
5 u |
8x5 =
40 u |
| Change |
- 32 u |
|
|
| After |
3 u |
5 u |
8 u |
The number of blue crayons remained unchanged.
LCM of 1 and 5 = 5
Total number of crayons at first = 40 u
40 u = 120
1 u = 120 ÷ 40 = 3
Number of crayons that Ivory had in the end
= 3 u + 5 u
= 8 u
= 8 x 3
= 24
Answer(s):24
