The ratio of the number of cupcakes in Container N to the number of cupcakes in Container P was 7 : 5. 20% of the cupcakes in Container N and 0.6 of those in Container P were vanilla. After transferring the cupcakes between the 2 boxes, the number of butter cream cupcakes in both boxes are the same. Likewise, the number of vanilla cupcakes in both boxes are the same. If a total of 195 cupcakes were moved, how many more cupcakes were there in Container N than Container P at first?
Container N |
Container P |
7 u |
5 u |
Vanilla |
Butter Cream |
Vanilla |
Butter Cream |
1.4 u |
5.6 u |
3 u |
2 u |
+ 0.8 u |
- 1.8 u |
- 0.8 u |
+ 1.8 u |
2.2 u |
3.8 u |
2.2 u |
3.8 u |
Number of vanilla cupcakes in Container N
= 20% x 7 u
=
20100 x 7 u
= 1.4 u
Number of butter cream cupcakes in Container N
= 7 u - 1.4 u
= 5.6 u
Number of vanilla cupcakes in Container P
= 0.6 x 5 u
= 3 u
Number of butter cream cupcakes in Container P
= 5 u - 3 u
= 2 u
Number of vanilla cupcakes in each box in the end
= (1.4 u + 3 u) ÷ 2
= 4.4 u ÷ 2
= 2.2 u
Number of butter cream cupcakes in each box in the end
= (5.6 u + 2 u) ÷ 2
= 7.6 u ÷ 2
= 3.8 u
Number of cupcakes moved
= 0.8 u + 1.8 u
= 2.6 u
2.6 u = 195
1 u = 195 ÷ 2.6 = 75
Number of more cupcakes in Container N than Container P at first
= 7 u - 5 u
= 2 u
= 2 x 75
= 150
Answer(s): 150