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प्रश्न
The average weight of a group of 25 men was calculated to be 78.4 kg. It was discovered later that one weight was wrongly entered as 69 kg instead of 96 kg. What is the correct average?
विकल्प
75.76
77.56
79.48
80.30
MCQ
उत्तर
79.48
Explanation:-
Total weight of 25 men = 25 × 78.4 = 1960
Due to the error in one entry, 96 has become 69
Difference = 27 kg
∴ Correct total = 1960 + 27 = 1987
∴ Correct total =`1987/25` = 79.48
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