Question

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 1

there are 4students join

Answer 2

Step-by-step explanation:

120×32+40x = 36(120+x)

3840+40x =4320+36x

4x = 408

x = 120

120+120 = 240 ans