Yoko had 144 pencils.
78 of them were green pencils and the rest were silver pencils. After she had given away some green pencils, the ratio of the number of green pencils to the number of silver pencils became 5 : 6. How many pencils did she have in the end?
| |
Green |
Silver |
Total |
| Before |
7x6 =
42 u |
1x6 =
6 u |
8x6 =
48 u |
| Change |
- 37 u |
|
|
| After |
5 u |
6 u |
11 u |
The number of silver pencils remained unchanged.
LCM of 1 and 6 = 6
Total number of pencils at first = 48 u
48 u = 144
1 u = 144 ÷ 48 = 3
Number of pencils that Yoko had in the end
= 5 u + 6 u
= 11 u
= 11 x 3
= 33
Answer(s):33
