Answers

2014-10-06T20:35:32+05:30
I think n(A∧B) = 13 but not exactly



0
2014-10-06T20:57:32+05:30
There is a formula for it
n(AUB) = n(A)+n(B)-n(A∧B)
now just substitute
51=20+44-n(A∧B)
n(A∧B)=15

0
oh sorry last step is wrong answer is 13