Find the missing number?

A. 5

B. 11

C. 9

D. 17

Answer: Option A

Solution(By Examveda Team)

The values in the segments of the upper middle circle equal the sum of the values in corresponding segments of the upper left and right hand circles.

The values in the segments of the lower middle circle equal the difference between values in corresponding segments of the lower left and right hand circles. So,

12 - 7 = x
x = 5.