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Let X be a discrete random variable. The...

Let X be a discrete random variable. The probability distribution of X is given below : Then E(X) equal to

A

6

B

4

C

3

D

minus 5

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The correct Answer is:
B
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HIMALAYA PUBLICATION-PROBABILITY-QUESTION BANK
  1. Let A and B be two events such that P(A) = 0.6, P(B) = 0.2 and P(A/B) ...

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  2. If A and B are independent events such that 0 < P(A) < 1 and 0 < P(B) ...

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  3. Let X be a discrete random variable. The probability distribution of X...

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  4. Let X be a distance random variable assuming values x(1),x(2) ,…….,...

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  5. Let A and B be two events .If P(A) = = 0.2 P(B) 0.4 ,P(A cup B)=0.6...

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  6. If P(A) =4/5 and P(A cap B) = 7/10 then P(B/A) =

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  7. If P(A cap B) = 7/10 and P(B) = 17/20 then P(A/B) =

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  8. If P(A) = 3/10, P(B) = 2/5 and P(A cup B ) = 3/5, then P(B/A) + P(A/B)...

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  9. If P(A) = 2/5, P(B) = 3/10 and P( A cap B )= 1/5 then, P(A^(') |B^('))...

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  10. If A and B are two events such that P(A) = 1/2, P(B) = 1/3, P(A|B) = 1...

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  11. If P(A) = 0.4, P(B) = 0.8 and P(B|A) = 0.6 then P(A cup B) =

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  12. If A and B are two events and A ne phi, B ne phi then

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  13. A and B are events such that P(A) = 0.4, P(B) = 0.3 and P( A cup B) = ...

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  14. You are given that A and B are two events such that P(B) = 3/5 and P(A...

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  15. You are given that A and B are two events such that P(B) = 3/5, P(A|B)...

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  16. If P(A) = 7/13, P(B) = 9/13 and P(A cap B)= 4/13. Then P(A^(')|B) =

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  17. If P(A)= (7)/(13), P(B)= (9)/(13) and P(AnnB)= (4)/(13) find P(A//B)

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  18. If A and B are such events that P(A) gt 0, and P(B) ne 1, then P(A^(')...

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  19. If A and B are two independent events with P(A) = 3/5 and P(B) = 4/9 t...

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  20. Three person A, B and C fire at a target, inturn starting. with A. The...

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