Question

- The average age of 4 members of a family is 25 years. If the head of the family is
included in this group, then the average age increases by 20%. Find out the age of the
head of the family.​

Answer 1

Answer:

let sum of ages be=X

then, X/4=25

X= 25*4

X=100

let age of head be y

then, 100+y/5=20/100*25 + 25

100+y=30*5

100+y=150

y=50

age of head= 50 years