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A committee of five is to be chosen from...

A committee of five is to be chosen from a group of 9 people. The probability that a certain married couple will either serve together or not at all is

A

`1//2`

B

`5//9`

C

`4//9`

D

`2//3`

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
  1. If A and B are independent events such that P(A) gt 0, P(B) gt 0, then

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  2. Twelve balls are distributed among three boxes, find the probability ...

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  3. A committee of five is to be chosen from a group of 9 people. The prob...

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  4. The probability of two events A and B are 0.25 and 0.50 respectivel...

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  5. about to only mathematics

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  6. A bag contains four tickets marked with numbers 112,121,211, and 222. ...

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  7. A box contains 2 balck, 4 white, and 3 balls. One ball is drawn at ran...

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  8. A student appears for tests I, II and III. The student is considered s...

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  9. A cricket club has 15 members, of them of whom only 5 can bowl. If the...

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  10. If (1 + 3p)/(3), (1 - p)/(4) and (1 - 2p)/(2) are the probabilities of...

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  11. An unbiased die with faced marked 1, 2, 3, 4, 5, and 6 is rolled four ...

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

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

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

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

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

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  17. about to only mathematics

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

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

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