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Quantitative Aptitude

Averages

The average w...

Question

The average weight of a class of 25 students is 34 kg. If the weight of their maths teacher is included, the average rises by 400 g. The weight of the teacher is

A

40.5

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B

45.4

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C

40.4

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D

44.4

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E

None of these

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Solution

The correct option is D
44.4

Weight of the maths teacher

= (34.4 $\times$ 26 - 34 $\times$ 25) kg

= 44.4 kg.

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