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4.Average
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The average weight of $6$ persons is increased by $5\, kg$ when one of them who weighs $40\, kg$ is replaced by a new man. The weight of new man is (in $kg$)
A
$76$
B
$74$
C
$72$
D
$70$
Solution
Weight of new man = Weight of replaced man + Increase in average $\times$ Number of persons
$=40+5 \times 6$
$=40+30=70 \,kg$
Standard 13
Quantitative Aptitude
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