Gujarati
Hindi
4.Average
medium

The average weight of $100$ students is $32\, kg$. The average weight of first $49$ students is $30\, kg$ and that of last $50$ students is $34\, kg$. What is the weight (in $kg$ ) of the $50^{ th }$ student ?

A

$25$

B

$30$

C

$32$

D

$33$

Solution

$\frac{49 \times 30+50 \times 34+x}{100}=32$

$1470+1700+x=3200$

$x=30$

Standard 13
Quantitative Aptitude

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