Question

five years ago the average Age of husband and wife was 23 year, today the average of husband wife and children is 20 how old is the child. ​

Answer 1

Answer:

14 years

Step-by-step explanation:

average =addition of quantities/no. of quantities

sum of age of husband and wife is 23×2=46

age of child

=(46+x)/3=20

=46+x =20×3

=46+x=60

=x=60-46

=x=15

Answer 2

Answer:

The child is 4 years old

Step-by-step explanation:

Let H be husband's age

Let W be wife's age

Let C be child's age

Five years ago, given

(H + W)/2 = 23

H + W = 23*2

H + W = 46 ------ (i)

After five years,

Husband would be H + 5

Wife would be W +5

So, (i) would become (H+5) + (W+5)

H + 5 + W + 5

H + W + 10

46 + 10 (H + W = 46)

56

So, After five years the sum of ages of H and W are 56 -----(ii)

Given, (H + W + C)/3 = 20

H + W + C = 60

56 + C = 60 {from (ii)}

Therefore,C = Child's age is 60-56 =4years