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the average weight of 10 students is 68.2kg later on it was discovered that weight of 1 student is taken wrongly as 49.5insteed of 59.5and 1student in the weight of 48kg left the hostal calculate correct mean |
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Answer» Answer: 71.55 Explanation: total weight =x AVERAGE= ×/10 = 68.2 which means sum(×)= 68.2×10 = 682 correct weight =59.5 wrong weight= 49.5 the average is less as the sum is less by 10( 59.5-49.5) ADDING 10 to 682 will give us the correct weight =692 now, a boy of 48 kg LEFT this means total weight = 692-48 =644 no of boys =9 NEW average =644÷9 = 71.55 |
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