There are 24 students in a class one of them who is 18 years old left the class and a new comer filled his place. If the avg age of the class was there by lowered by one month . The age of new comer is  Select
A) 14years  B) 15years  C) 16 years  D) 17 years  E) 18 years
Let new comer age was x.   Average age decreased by = 1 month = 1/12 years.   You can use this formula for these type of problems.   No. of students in class* aged decreased = difference of replacement   24 * 1/12 = 18 - x   2 = 18 - x   x = 16 years.   Age of new comer age was 16 years.   Answer: Option 16 years
<result>C</result>
There are 24 students in a class one of them who is 18 years old left the class and a new comer filled his place. If the avg age of the class was there by lowered by one month . The age of new comer is