Class D, E and F were given some sweets to sell for their charity drive. The average number of sweets the 3 classes had at first was 227. After Class E sold twice as many sweets as Class D and Class F sold ³₄ as many sweets as Class E, the average number of sweets the 3 classes had left was 44. How many sweets did Class D and Class F sell altogether?

Class D	Class E	Class F
1x2	2x2
	4x1	3x1
2 u	4 u	3 u

Class D : Class E : Class F
2 : 4 : 3

Total number of sweets that the 3 classes had at first
= 3 x 227
= 681

Number of sweets that the 3 classes left
= 3 x 44 
= 132

Number of sweets that were sold by 3 classes
= 681 - 132
= 549

2 u + 4 u + 3 u = 549
9 u = 549

1 u = 549 ÷ 9 = 61

Total number of sweets sold by Class D and Class F
= 2 u + 3 u
= 5 u
= 5 x 61
= 305

Answer(s): 305