Class L, M and N were given some caramel apples to sell for their fund-raising project. The average number of caramel apples the 3 classes had at first was 249. After Class M sold twice as many caramel apples as Class L and Class N sold ³₄ as many caramel apples as Class M, the average number of caramel apples the 3 classes had left was 54. How many caramel apples did Class L and Class N sell altogether?

Class L	Class M	Class N
1x2	2x2
	4x1	3x1
2 u	4 u	3 u

Class L : Class M : Class N
2 : 4 : 3

Total number of caramel apples that the 3 classes had at first
= 3 x 249
= 747

Number of caramel apples that the 3 classes left
= 3 x 54 
= 162

Number of caramel apples that were sold by 3 classes
= 747 - 162
= 585

2 u + 4 u + 3 u = 585
9 u = 585

1 u = 585 ÷ 9 = 65

Total number of caramel apples sold by Class L and Class N
= 2 u + 3 u
= 5 u
= 5 x 65
= 325

Answer(s): 325