Average weight of $8$ boys is $57$ kgs, if weights of seven of them are $65, 43. 29, 37, 82, 50$ and $55$ kgs, then weight of the eighth student is

45 kgs

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55 kgs

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65 kgs

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none of these

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Solution

The correct option is A none of these
Total weight $= 57 \times 8 = 456 k g$
Sum of weight of 7 boys $= 361$ kg
Weight of 8th student $= 456 - 361 = 95 k g$

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Average weight of 8 boys is 57 kgs, if weights of seven of them are 65,43.29,37,82,50 and 55 kgs, then weight of the eighth student is

The correct option is A none of theseTotal weight =57×8=456kgSum of weight of 7 boys =361 kgWeight of 8th student =456−361=95kg

Average weight of $8$ boys is $57$ kgs, if weights of seven of them are $65, 43. 29, 37, 82, 50$ and $55$ kgs, then weight of the eighth student is

The correct option is A none of these
Total weight $= 57 \times 8 = 456 k g$
Sum of weight of 7 boys $= 361$ kg
Weight of 8th student $= 456 - 361 = 95 k g$