SSC CGL 16 Aug 2017 Shift 1 Paper

Question : 56 of 100

Marks: +1, -0

The ratio of number of boys and girls in a class is 2 : 3 . The average weight of boys and girls in the class is 18 kg and 21 kg, respectively. What is the average weight (in kgs) of all the boys and girls together ?

$99/5$
$101/5$
$109/6$
$96/5$

Validate

Solution:

Required average weight

= {2× 18+3× 21}/{2+3}

= {36+63}/{5}= {99}/{5}\kg

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