Question

The ratio of the age of a,b and c is3:4:5 if the average of their ages is 24year then what is sum of ages of b and c

Answer 1

Answer:

Average of n numbers = sum of all the numbers/ total numbers

Step-by-step explanation:

Ratio of the numbers = 3:4:5,

Average of the numbers = 24.

So, let the common factor in the ratio be X,

then By the formula for solving the averages, we get,

3x+4x+5x/3= 24,

Or, 12x/3 = 24,

Or, 4x = 24,

then, x = 6.

So, Second number = 4x = 24.

and, Third number = 5x = 30.

And lastly, Sum of Secord and the third number = 54.