The sum of the ages of 5 children born at the intervals of 3 year each is 60 year. what is the age of the youngest child ?  Choose the correct choice from the following choices:
A) 4 year	B) 6 year	C) 10 year	D) None of these	E) 9 year
Solution   let the ages of the children be x,(x + 3),(x + 6),(x + 9) and (x + 12) year.   then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 60 â‡” 5 x = 30 â‡” x= 6.   âˆ´ Age of the youngest child = x = 6 years. Answer 6 year
<result>B</result>
The sum of the ages of 5 children born at the intervals of 3 year each is 60 year. what is the age of the youngest child ?