Out of a total of 10 students, the average weight of 9 students is 60 kg. If the weight of the 10th…
The nine students weigh \(9 \times 60 = 540\) kg in all. If the tenth student weighs \(w\), then \(w = \frac{540+w}{10} + 9\), so \(10w = 630 + w\) and \(9w = 630\). Hence…
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Out of a total of 10 students, the average weight of 9 students is 60 kg. If the weight of the 10th student is 9 kg more than the average weight of all the 10 students, then the weight of the 10th student would be
Answer and explanation
Correct answer C
The nine students weigh kg in all. If the tenth student weighs , then , so and . Hence kg.
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