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The probability that an event A happens ...

The probability that an event A happens in one trial of an experiment, is 0.4. Three independent trials of the experiments are performed. The probability that the event A happens atleast once, is :

A

0.936

B

0.784

C

0.904

D

none of these

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
  1. An unbiased die with faced marked 1, 2, 3, 4, 5, and 6 is rolled four ...

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  2. Three numbers are chosen from 1 to 30. The probability that they are n...

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  3. The probability that an event A happens in one trial of an experiment,...

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  4. If two A and B such that P(A) gt 0 and P(B) ne 1, then P(barA//barB) ...

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  5. A speks truth in 60% cases and B speaks truth in 70% cases. The probab...

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  6. Let X be a set containing n elements. Two subsets A and B of X are cho...

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  7. about to only mathematics

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  8. If P(AnnB)=1/2,P( A nn B )=1/3, P(A)=p , P(B)=2p , then find the v...

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  9. If P(A cup B)=3//4 " and " P(overline(A))=2//3, " then " P(overline(A)...

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  10. Find the probability that in a random arrangement of the letters of th...

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  11. A letter is taken out at random from 'ASSISTANT and another is taken o...

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  12. Out of 40 consecutive integers, two are chosen at random, the probabil...

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  13. Three integers are chosen at random from the first 20 integers. The ...

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  14. three identical dice are rolled . Find the probability that the same n...

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  15. Let A, B, C be three events such that A and B are independent and P(C)...

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  16. Two small squares on a chess board are chosen at random. Then, the pro...

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  17. An ordinary cube has four black faces, one face marked 2 and another m...

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  18. The chance of an event happening is the square of the chance of a seco...

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  19. What is the probability that the 13th days of a randomly chosen mon...

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  20. There are 20 cards. Ten of these cards have the letter "I" printed on ...

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