The average height of the first six students is 180 cm, the average height of the last eight students is 185 cm. The average height of the total 16 students is 190 cm. Find the average height of the rest two students.
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$272$
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$230$
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$253$
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$260$
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$None of these$
E
Correct answer
Explanation
Total of 6 students = 6 × 180 = 1080. Total of 8 students = 8 × 185 = 1480. Total of 16 students = 16 × 190 = 3040. Sum of first 6 + last 8 = 1080 + 1480 = 2560. Remaining 2 students' total = 3040 - 2560 = 480. Their average = 480/2 = 240. Since 240 is not in options, answer is None of these.