Question

Average age of two brothers is 9 years. It is increased by 9 years, when their mother's age is also included. Then the mothers age is: 1. 35 years 2. 36 years 3. 37 years 4. 38 years​

Answer 1

Answer:

Step-by-step explanation: let a and b be brothers age and c be mother age

A. T. Q

a+b/2=9

a+b=18 and

a+b+c/3=9+9

a+b+c=54

18+c=54

C=36

Mother age is 36 yrs

Answer 2

Answer:

ans. is 36

Step-by-step explanation:

Let one brother is x and another one is y.

given,the average age of two is 9.

i.e.,

x+y/2=9 (****)

when the mothers age added the age increases by 9 years.

so,

mothers age is z (say)

here,x+y+z/3=9+9

x+y+z/3=18

x+y+z=54.

here by (****)

x+y=18.

so,z=54-18=36..

hope it is correct...and it helps u...

Thank u :)