The average height of five pupils is 68 inches. If one pupil is 70 inches and three others are 76 inches each, then what is the height (in inches) of the fifth pupil?
Q1. The average height of five pupils is 68 inches. If one pupil is 70 inches and three others are 76 inches each, then what is the height (in inches) of the fifth pupil?
Answer: 42
Explanation: Total height = 5×68 = 340; sum of four known pupils = 70+76+76+76 = 298; fifth pupil = 340−298 = 42 inches.