Question

Average age of 22 persons is 28 years. 2
person left the group then average age
decreases by 1.5 years. Find the average
age of two persons

Answer 1

Answer:

51.5years

Step-by-step explanation:

Given,

Average age of 22 persons=28years

if 2persons left average age of 20persons will be 26.5years

Now,

let sum of all the ages be x

and that of sum of 2persons who left is y

x/22=28

x=28×22

x=616

(x-y)/20=26.5

On putting value of x

(616-y)=26.5×20

616-y=530

y=616-513

y=103

average age of two persons=y/2

=103/2

=51.5years

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