Class L, M and N were given some lollipops to sell for their donation drive. The average number of lollipops the 3 classes had at first was 222. After Class M sold twice as many lollipops as Class L and Class N sold ³₄ as many lollipops as Class M, the average number of lollipops the 3 classes had left was 42. How many lollipops 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 lollipops that the 3 classes had at first
= 3 x 222
= 666

Number of lollipops that the 3 classes left
= 3 x 42 
= 126

Number of lollipops that were sold by 3 classes
= 666 - 126
= 540

2 u + 4 u + 3 u = 540
9 u = 540

1 u = 540 ÷ 9 = 60

Total number of lollipops sold by Class L and Class N
= 2 u + 3 u
= 5 u
= 5 x 60
= 300

Answer(s): 300