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प्रश्न
The mean weight of 10 boys is 50 kg. When one boy left, the mean weight becomes 49 kg. The weight of that boy is ______.
पर्याय
50 kg
49 kg
59 kg
55 kg
MCQ
रिकाम्या जागा भरा
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उत्तर
The mean weight of 10 boys is 50 kg. When one boy left, the mean weight becomes 49 kg. The weight of that boy is 59 kg.
Explanation:
The mean weight of 10 boys is 50 kg
Total weight of the 10 boys = 10 × 50 = 500 kg
When one boy left, the mean weight becomes 49 kg
Total weight of the remaining 9 boys = 9 × 49 = 441 kg
The weight of the boy who left = 500 − 441 = 59 kg
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