Eric bought 2 times as many chocolate bars as candy bars. The total mass of chocolate bars and candy bars was 1566 g. The mass of candy bars was 126 g less than that of the chocolate bars. The mass of 1 candy bar was 33 g heavier than 1 chocolate bar.

1. Find the number of candy bars that Eric bought.
2. Find the mass of 1 chocolate bar.

	Chocolate Bars	Candy Bars	Total
Number of sets	2 sets	1 set
Compare each	1 u	1 u + 33
Total value	846 g	720 g	1566 g

(a)
Mass of candy bars = 1 set
Mass of chocolate bars = 2 sets

Mass of candy bars = (1566 - 126) ÷ 2 = 720 g
Mass of chocolate bars = 720 + 126 = 846 g

Mass of 1 set of candy bars = 720 g
Mass of 1 set of chocolate bars = 846 ÷ 2 = 423 g

Difference in the mass between 1 set of candy bars and 1 set of chocolate bars
= 720 - 423
= 297 g

Number of items in each set
= 297 ÷ 33
= 9

Number of candy bars
= 1 x 9
= 9

(b)
Mass of 1 candy bar
= 720 ÷ 9
= 80 g

Mass of 1 chocolate bar
= 80 - 33
= 47 g

Answer(s): (a) 9; (b) 47 g