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profileChandan Kumar
asked 2020-03-05 10:38:38 
The average age of $46$ girls in a group is $16$ years. When $2$ women's age included in it, the average increases by $2$ years. what is the average of the women's age in years?
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answered 2020-03-05 10:50:22 

Solution $1$

Initially, total age $=46×16$

After inclusion of $2$ women's age, total age $=48×18$

Sum of the $2$ women's age $=48×18-46×16=128$

Average of $2$ women's age $=\dfrac{128}{2}=64$

Solution 2

Using this formula, we get sum of the 2 women's age as $2×16+2(46+2)$ and therefore required average is $16+46+2=64$

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