Exams › SSC CGL (Prelims) › General

The average height of 15 students is 160 cm. If two students leave, the new average becomes 159 cm. What is the average height of the two students who left?

1. 164.5 cm
2. 166.5 cm
3. 168.5 cm
4. 170.5 cm

Correct answer: 166.5 cm

Solution

Initial total height = 15 × 160 = 2400 cm. After two leave, remaining 13 students have total height = 13 × 159 = 2067 cm, so the two students' total height = 2400 − 2067 = 333 cm. Their average height = 333 ÷ 2 = 166.5 cm.

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