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If A and B are two events such that ...

If A and B are two events such that `P(A) = 0.4 , P(A uu B) = 0.7 and P(A∩B) = 0.2` then P(B)=

A

`0.1`

B

`0.3`

C

`0.5`

D

None of these

Text Solution

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The correct Answer is:
C
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TARGET PUBLICATION-PROBABILITY-COMPETITIVE THINKING (ADDITION THEOREM AND CONDITIONAL PROBABILITY)
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  3. If P(A) = 0.4 P(B) = x , P(A uu B) = 0.7 and the events A and B ar...

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  4. The probabilities of three mutually exclusive events are 2/3, 1/4, ...

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  8. A dice is tossed once and even number has come up. The probability tha...

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  9. A die is thrown. Let A be the event that the number obtained is gre...

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  10. Three numbers are chosen at random without replacement from {1,2,3,......

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  11. A bag contains 4 red and 6 blach balls O balls is drawn at random from...

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  12. The Probability that at least one of the events E(1) and E(2) will occ...

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  13. The probability that at least one of the events A and B occurs is 3/5....

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  14. If P(A) = (4)/(5), P(B) = (2)/(5), P(A nn B) = (1)/(2) then P(A uu B)...

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  15. If P(A) = 0.7, P(B) = 0.4, P(A nn B) = 0.3, then P(A nn B') =

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  16. Let A and B be events for which P(A) = x, P(B) = y, P(A nn B) = z,then...

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  17. If P(A) = 0.25, P(B) = 0.50 , P(A nn B) = 0 . 14 then P(barA nn barB)

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  18. If P(A) = P(B) = x and P(A nn B) = 0.14, then P(A' nn B') =(1)/(3), t...

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  19. Given P(A)=3/5 and P(B)=1/5 . Find P(A "or" B), if A and B are mutuall...

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