The average age of 16 students in a college is 20. Out of them, the average age of 5 students is 20 and the average age of the other 10 students is 20.4. Find the age of the 16th student.
A.24
B.22
C.20
D.16✓ Correct
Explanation
Total age = 16 × 20 = 320. Sum of 5 students = 100; sum of 10 students = 204. Age of 16th = 320 – 100 – 204 = 16.
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