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Question
The average height of a group of 12 students is 170 cm. Four students of heights 154 cm, 157 cm, 165 cm, and 172 cm left the group. What is the new average height (in cm) of the group?
Options
165
174
176
170
MCQ
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Solution
174
Explanation:
Height of four students who left the group = 154 + 157 + 1.65 + 172
= 648 cm
Height of remaining = 12 × 170 − 648
= 2040 − 648
= 1392 cm
∴ Average = `1392/8`
= 174 cm
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Average (Entrance Exam)
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