Question

the average age of a grp of 30 boys is 12 yrs. when 2 new boys join them the average age increases by 1/4 yrs. what is the average age of the new boys?
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Answer 1

Step-by-step explanation:

Here average of 30 boys is 12 years

Sum of their ages = 30 *12 = 360

When we add 2more boys no. of boys becomes 32 and their average of their ages is increased by 1/4 so it is 12+1/4 =49/4

Sum of the ages =32*49/4= 392

Sum of ages of the 2 boys is 392-360 =32

Average of the 2 boys is=32/2=16

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