Question

6. The average age of 32 students in a class is
15 years. If two students leave the class, the
average age drops to 14.9 years. What is the
average age of the two students who left?
32
​

Answer 1

Answer:

Average age of 30 students in a class = 12 years

5 students = 10 years

Another 5 students = 14 years

remaining student= 30-5-5=20

let's assume average age of 20 student=x

Total age of all student=average age* total no of student

30∗

12=

5∗

10+

5∗

14+

20∗

x

360=

50+

70+

20x

360=

120+

20x

240=

20x

x=

12

Answer (C) 12 Years

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