Tammy had 96 pencils.
23 of them were white pencils and the rest were blue pencils. After she had given away some white pencils, the ratio of the number of white pencils to the number of blue pencils became 7 : 8. How many pencils did she have in the end?
| |
White |
Blue |
Total |
| Before |
2x8 =
16 u |
1x8 =
8 u |
3x8 =
24 u |
| Change |
- 9 u |
|
|
| After |
7 u |
8 u |
15 u |
The number of blue pencils remained unchanged.
LCM of 1 and 8 = 8
Total number of pencils at first = 24 u
24 u = 96
1 u = 96 ÷ 24 = 4
Number of pencils that Tammy had in the end
= 7 u + 8 u
= 15 u
= 15 x 4
= 60
Answer(s):60
