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A student appears for tests I, II and II...

A student appears for tests I, II and III. The student is considered successful if he passes in tests I, II or III or all the three. The probabilities of the Student passing in tests I,II and III are m, n and `1/2` respectively. If the probability of the student to be successful is `1/2`, then which one of the following is correct? (a) `m (1+n)=1` (B) `n (1+m) =1` (C) `m=1` (D) `mn=1 `

A

p=q=1

B

`p=q=(1)/(2)`

C

p=0, q=1

D

there are infinite values of p and q

Text Solution

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
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  2. A box contains 2 balck, 4 white, and 3 balls. One ball is drawn at ran...

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

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

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

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

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

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

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

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

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

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  12. about to only mathematics

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

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

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

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

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

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

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

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