The average height of five pupils is 68 inches. If one is 70 inches and three are 76 inches; what is the fifth pupil’s height?

The average height of five pupils is 68 inches. If one is 70 inches and three are 76 inches; what is the fifth pupil’s height?

A: 42

B: 44

C: 46

D: 48

Average height = 68 inches; so total = 5 × 68 = 340 inches.