1.

3 years ago the average age of a and b was 18 years with c joining them the average become 22 years. how old c

Answer» PRESENT AGE of a=x
present age of b=y
present age of c=z

given
\frac{x - 3 + y - 3}{2} = 18


and
\frac{x - 3 + y - 3 + z}{3} = 22


now by solving both EQUATION we will get
z=66-36
so age of c is 30 YEARS


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