Question 34
SetsGiven that n(P) = 19, n(P∪Q) = 38 and n(P∩Q) = 7, find n(Q).
- A.26
- B.31
- C.36
- D.50
Show the answer and explanation
Answer: A (26)
Explanation
n(P∪Q) = n(P) + n(Q) − n(P∩Q): 38 = 19 + n(Q) − 7, so n(Q) = 26.
Given that n(P) = 19, n(P∪Q) = 38 and n(P∩Q) = 7, find n(Q).
Answer: A (26)
n(P∪Q) = n(P) + n(Q) − n(P∩Q): 38 = 19 + n(Q) − 7, so n(Q) = 26.