Average weight of 24 students is 35, kgs. If weight of teacher is added average increased by 400, gm

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4.Average

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The average weight of $24$ students is $35\, kgs.$ If the weight of teacher is added the average increased by $400\, gms$. What is the weight of the teacher? (in $kg$)

A

$45$

B

$36$

C

$54$

D

$63$

Solution

Total weight of $24$ students $=24 \times 35=840 kg$

Total weight after teacher is added $=25 \times 35.4=885 kg$

Weight of teacher $=885-840=45 kg$

Standard 13

Quantitative Aptitude

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