Question

The average of all students in a class is 15 yrs. Out of them
average age of 15 students is 12 yrs and average age of remaining students is 16
yrs. Then how many students are there in the class ?
(1) 60
(2) 45
(3) 40
(4) 50
​

Answer 1

Answer:

60

Step-by-step explanation:

Let total number of students be x.

15x = 15*12 + (x-15)*16

x= 60