The ratio of Zoe's stickers to Lilian's stickers at first was 3 : 7. After Zoe gave Lilian 94 stickers, the ratio of Zoe's stickers to Lilian's stickers is 1 : 3. What was the number of stickers they had in all?
|
Zoe |
Lilian |
Total |
Before |
3x4 = 12 u |
7x4 = 28 u
|
10x4 = 40 u |
Change |
- 94 |
+ 94 |
|
After |
1x10 = 10 u |
3x10 = 30 u |
4x10 = 40 u |
Number of stickers that Zoe gave Lilian
= 12 u - 10 u
= 2 u
2 u = 94
1 u = 94 ÷ 2 = 47
Total number of stickers that they had
= 40 u
= 40 x 47
= 1880
Answer(s): 1880