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 college student.

Given,

Average age of 16 students = 20

$$=$$>  Sum of the ages of 16 students = 16 x 20 = 320

Average age of 5 students = 20

$$=$$>  Sum of the ages of 5 students = 5 x 20 = 100

Average age of other 10 students = 20.4

$$=$$>  Sum of the ages of other 10 students = 10 x 20.4 = 204

$$\therefore\ $$Age of the 16th student = Sum of the ages of 16 students - Sum of the ages of 15 students = 320 - (100+204) = 16

Hence, the correct answer is Option B