Sean bought 3 times as many chocolate bars as candy bars. The total mass of chocolate bars and candy bars was 1950 g. The mass of candy bars was 150 g less than that of the chocolate bars. The mass of 1 candy bar was 55 g heavier than 1 chocolate bar.

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

	Chocolate Bars	Candy Bars	Total
Number of sets	3 sets	1 set
Compare each	1 u	1 u + 55
Total value	1050 g	900 g	1950 g

(a)
Mass of candy bars = 1 set
Mass of chocolate bars = 3 sets

Mass of candy bars = (1950 - 150) ÷ 2 = 900 g
Mass of chocolate bars = 900 + 150 = 1050 g

Mass of 1 set of candy bars = 900 g
Mass of 1 set of chocolate bars = 1050 ÷ 3 = 350 g

Difference in the mass between 1 set of candy bars and 1 set of chocolate bars
= 900 - 350
= 550 g

Number of items in each set
= 550 ÷ 55
= 10

Number of chocolate bars
= 3 x 10
= 30

(b)
Mass of 1 candy bar
= 900 ÷ 10
= 90 g

Answer(s): (a) 30; (b) 90 g