If n(P) = 20 and n(Q) = 30 and n(PuQ) = 40, find the value n(PnQ)
-
10
- 30
- 15
- 40
The correct answer is: A
Explanation
n(PuQ) = n(p) + n(q) - n(PnQ)
40 = 20 + 30 - n(PnQ)
n(PnQ) = 50 - 40 = 10
There is an explanation video available .