A) 15
B) 20
C) 11
D) None of these
Correct Answer: C
Solution :
[c]From the given condition \[n(M\cup F)=15\], \[n(F)=8,n(M\cap F)=4\] So, \[n(M\cup F)=n(M)+n(F)-n(M\cap F)\] \[n(M)=n(M\cup F)+n(M\cap F)-n(F)\] Hence \[n(M)=15+4-8=11\]You need to login to perform this action.
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