Question

The average age of 5 boys is l8 years a new boy joins them by which the average becomes l9 years, then the age of a new comer is_______.i)20 yearsii)22 yearsiii)24 yearsiv)30 years.

Answer 1

Let the boys age be x.

Now,

18*5+x= 19*6

x= 114-90= 24

Therefore, age = 24 years