Average age of students of an adult school is 40 years. 120 new students whose average age is 32 ...
Average age of students of an adult school is 40 years. 120 new students whose average age is 32 years joined the school. As a result the average age is decreased by 4 years. Find the number of students of the school after joining of the new students.
Answer/Solution
240
Steps/Work
Explanation :
Let the original no. of students be x.
According to situation, 40x + 120*32 = (x + 120)36 ⇒ x = 120
So, Required no. of students after joining the new students
= x + 120 = 240.
Answer : D
Let the original no. of students be x.
According to situation, 40x + 120*32 = (x + 120)36 ⇒ x = 120
So, Required no. of students after joining the new students
= x + 120 = 240.
Answer : D