Perry bought 5 times as many chocolate bars as candy bars. The total mass of chocolate bars and candy bars was 960 g. The mass of candy bars was 80 g less than that of the chocolate bars. The mass of 1 candy bar was 84 g heavier than 1 chocolate bar.

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

	Chocolate Bars	Candy Bars	Total
Number of sets	5 sets	1 set
Compare each	1 u	1 u + 84
Total value	520 g	440 g	960 g

(a)
Mass of candy bars = 1 set
Mass of chocolate bars = 5 sets

Mass of candy bars = (960 - 80) ÷ 2 = 440 g
Mass of chocolate bars = 440 + 80 = 520 g

Mass of 1 set of candy bars = 440 g
Mass of 1 set of chocolate bars = 520 ÷ 5 = 104 g

Difference in the mass between 1 set of candy bars and 1 set of chocolate bars
= 440 - 104
= 336 g

Number of items in each set
= 336 ÷ 84
= 4

Number of chocolate bars
= 5 x 4
= 20

(b)
Mass of 1 candy bar
= 440 ÷ 4
= 110 g

Answer(s): (a) 20; (b) 110 g