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If the probability for A to fail in one ...

If the probability for A to fail in one exam is 0.2 and that for B is 0.3 , then the probability that either A or B fails is

A

`0.14`

B

`0.6`

C

`0.44`

D

`0.24`

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The correct Answer is:
C
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AAKASH SERIES-PROBABILITY-Exercise-I
  1. If P(A)=(1)/(2), P(B)=(1)/(5), A and B are independent events then P((...

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  2. A and B are two possible events of an experiment such that P(A)=0.3, P...

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  3. If the probability for A to fail in one exam is 0.2 and that for B is ...

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  4. The probability that a boy A will get a scholarship is 0.9 and that an...

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  5. If A and B are two independent events such that P(AnnB)=1//6 and P(Ann...

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  6. If A and B are two independent events of a random experiment such that...

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  7. At a selection, the probability of selection of A is 1/7 and that of B...

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  8. In the above problem, the probability that both are selected is

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  9. At a selection, the probability of selection of A is 1/7 and that of B...

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  10. Three cards are drawn from pack successively without replacement, the ...

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  11. Three cards are drawn from pack successively without replacement, pro...

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  12. Two dice are rolled and 3 coins are tossed. The probability of getting...

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  13. From each of 3 married couples one partner is selected at random then ...

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  14. A man is known to speak the truth 3 out of 4 times. He throws a die an...

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  15. A bag contains 5 balls and it is not known how many of them are white....

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  16. Out of the first 25 natural numbers two are chosen at random. The prob...

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  17. A fair die is tossed twice. The probability of getting 4, 5 or 6 on th...

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  18. A bag contains 4 black , 5 white and 6 red balls. If 4 balls are drawn...

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  19. Two persons A and B are rolling die on the condition that the person w...

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  20. An urn A contains 8 black balls and 5 white balls. A second urn B cont...

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