1. Average age of 6 boys is 14 years. Average age of 11 girls is 12 years. What is the average age (in years) of all boys and girls?
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By: anil on 05 May 2019 02.04 am
Average age of 6 boys = 14 years => Total age of 6 boys = $$6 imes14=84$$ years Similarly, total age of 11 girls = $$11 imes12=132$$ years $$ herefore$$ Average age (in years) of all boys and girls = $$frac{(84+132)}{(6+11)}$$ = $$frac{216}{17}=12.7$$ => Ans - (A)
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