English
Gujarati
1.Set Theory
medium

माना $n(U) = 700,\,n(A) = 200,\,n(B) = 300$ तथा $n(A \cap B) = 100,$ तब $n({A^c} \cap {B^c}) = $

A

$400$

B

$600$

C

$300$

D

$200$

Solution

$n({A^c} \cap {B^c})$ $= n[(A B)c] = $$n(U) – n(A \cup B)$$ = $$n(U) – [n(A) + n(B) – n(A \cap B)]$ $= 700 -[200 + 300 -100] = 300.$

Standard 11
Mathematics

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