Mathematics
NULL
Medium
Question
Thirty-five boys were taken to average 180 cm; one height 166 cm should have been 106 cm. Find the actual average (2 d.p.).
A
179.29 cm
B
178.29 cm
✓ Official correct answer
C
179.38 cm
D
178.39 cm
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A
179.29 cm
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B
178.29 cm
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C
179.38 cm
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D
178.39 cm
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Explanation
Correction −60 cm ⇒ average = 180 − 60/35 ≈ 178.29 cm.