WBJEE 2016 Math Solved Paper

P (A ∪ B) = P (A) + P (B) - P (A ⋂ B)
⇒ P (A) + P (B) = P (A ∪ B) + P (A ⋂ B)

3

4

≤ P (A ∪ B) ≤ 1

1

8

≤ P (A ⋂ B) ≤

3

8

so,

7

8

≤ P (A ∪ B) + P (A ⋂ B) ≤

11

8

so, P (A) + P (B) ≥

7

8

(C)
P (A) + P (B) ≤

11

8

(A)