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- Quantitative Aptitude
4.Average
hard
The average weight of $24$ students in section $A$ of a class is $58 \,kg,$ whereas the average weight of $26$ students in section $B$ of the same class is $60.5 \,kg$. Find out the average weight of all the $50$ students of the class. (in $kg$)
A
$57.4$
B
$59.3$
C
$58.9$
D
$59.7$
Solution
Average weight of $24$ students of section $A=58 \,kg$
Total weight of $24$ students of section $A=58 \times 24=$ $1392 \,kg$
Average weight of $26$ students of section $B=60.5 \,kg$
Total weight of $26$ students of section $B=60.5 \times 26=$ $1573 \,kg$
Total weight of $50$ students $=(1392+1573) \,kg$ $=2965 \,kg$
Average weight of the students in the class $=\frac{2965}{50}=59.3 \,kg$
Standard 13
Quantitative Aptitude
