Question

3. 48
145. In a dance class of 12 students, one of the student
who is 15 years old leaves the class and a new
student is admitted. This change increases the
average age of the class by 3 months. Then age of
the new students is:
1. 16 years
3. 18 years
2. 17 years
4. 20 years​

Answer 1

Step-by-step explanation:

The average age of a class of 20 students is 12 years. Out of which one student whose age is 10 year left the class and two new boys entered the class. The average of the class remains the same and the difference between the ages of new boys is 4 year. What will be the age of younger one .