Class G, H and J were given some mini cupcakes to sell for their donation drive. The average number of mini cupcakes the 3 classes had at first was 230. After Class H sold twice as many mini cupcakes as Class G and Class J sold
34 as many mini cupcakes as Class H, the average number of mini cupcakes the 3 classes had left was 53. How many mini cupcakes did Class G and Class J sell altogether?
Class G |
Class H |
Class J |
1x2 |
2x2 |
|
|
4x1 |
3x1 |
2 u |
4 u |
3 u |
Class G : Class H : Class J
2 : 4 : 3
Total number of mini cupcakes that the 3 classes had at first
= 3 x 230
= 690
Number of mini cupcakes that the 3 classes left
= 3 x 53
= 159
Number of mini cupcakes that were sold by 3 classes
= 690 - 159
= 531
2 u + 4 u + 3 u = 531
9 u = 531
1 u = 531 ÷ 9 = 59
Total number of mini cupcakes sold by Class G and Class J
= 2 u + 3 u
= 5 u
= 5 x 59
= 295
Answer(s): 295