#28 Average Quantitative Aptitude Question

Find the average of all prime numbers between 30 and 50. 

A. 30
B. 33.6
C. 39.8
D. 44.9

Ans: C.Sol.
There are five prime numbers between 30 and 50.
They are 31, 37, 41, 43 and 47
∴ Required average = [31 + 37 + 41 + 43 + 47 / 5] = 199/ 5 = 39.8.