Question

SCUTEU vy TT.
(f) The average age of 4 boys is 13 years. After coming one more boy the
average age becomes 12 years. Find the age of new boy who came after.​

Answer 1

Answer:

hello

Step-by-step explanation:

Let the ages of 4 boys be a,b,c,d respectively...

a+b+c+d / 4 = 13

a+b+c+d = 52..........1)

With one more added,

a+b+c+d+e / 5 = 12

a+b+c+d+e = 60.........2)

2) - 1)

(a+b+c+d+e) - (a+b+c+d+e) = 60 - 52

e = 8

Hence, the age of the new boy is 8