UPSC NDA II 2013 Mathematics Paper

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Question : 78 of 120

Marks: +1, -0

If A and B are independent events such that P(A)=‌

1

5

,P(A∪B)=‌

7

10

, then what is P(B) equal to?

‌
2
7
‌
3
7
‌
3
8
‌
7
9

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