Question

on 13
he total age of 9 boys is 128. The total age of the first 4 boys is 62 and that of the next 4 boys is 48. Find the age of the 9th boy.​

Answer 1

Answer:

The age of the 9th boys is 18

Answer 2

The age of the 9th boy = 18

Given :

• The total age of 9 boys is 128.
• The total age of the first 4 boys is 62 and that of the next 4 boys is 48

To find :

The age of the 9th boy

Solution :

Step 1 of 2 :

Find total age of 8 boys

Here it is given that the total age of the first 4 boys is 62 and that of the next 4 boys is 48

So total age of 8 boys

= 62 + 48

= 110

Step 2 of 2 :

Find age of the 9th boy

Now total age of 9 boys is 128.

Hence the age of the 9th boy

= Total age of 9 boys - Total age of 8 boys

= 128 - 110

= 18

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