The average weight of 29 students is 28 kg. By the admission of a new student the average weight is reduced to 27.8 kg. The weight of the new student is

22 kg

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21 kg

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22.4 kg

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21.6 kg

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Solution

The correct option is A 22 kg
Weight of new student
$= 30 \times 27.8 - 29 \times 28$
$= 834 - 812 = 22 k g .$

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The average weight of 29 students is 28 kg. By the admission of a new student the average weight is reduced to 27.8 kg. The weight of the new student is

The correct option is A 22 kgWeight of new student=30×27.8−29×28=834−812=22 kg.

The correct option is A 22 kg
Weight of new student
$= 30 \times 27.8 - 29 \times 28$
$= 834 - 812 = 22 k g .$