Gujarati
Hindi
4.Average
easy

The mean weight of $34$ students of a school is $42 \,kg$. If the weight of the teacher be included, the mean rises by $400 \,g$. Find the weight of the teacher (in $kg$).

A

$55$

B

$57$

C

$66$

D

$56$

Solution

Weight of the teacher $=42.4 \times 35-42 \times 34=56 kg$

Standard 13
Quantitative Aptitude

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