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The probability distribution of a random...

The probability distribution of a random variable X is given by

Then `1/(2sigma)=`

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The correct Answer is:
`0.25`
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MCGROW HILL PUBLICATION-PROBABILITY-Solved Examples (Numerical Answer )
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  2. Suppose A, B and C are three mutually exclusive and exhaustive events ...

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  3. The probability distribution of a random variable X is given by T...

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  4. Suppose E1 and E2 are two events of a sample space such that P(E1)=1/2...

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  5. If A and B are two events such that P((A uu B)')=1/6 , P(A nn B)=1/4 a...

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  6. For a random variable X if P(X=k) = 4((k+1)/5^k)a, for k=0,1,2,…then a...

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  7. A student has to appear in two examinations A and B. The probabilities...

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  8. Suppose P(A)=0.6, P(A uu B)=P(A nn B), then 6.1P (A nn B) + 4.2 P(B) i...

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  9. If A, B are two events such that P(A')=0.3, P(B)=0.4 and P(A nn B')=0....

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  10. Suppose A and B are two events and P(B) = p, P(A) = p^2 where 0 ltp l...

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  11. A man takes a step forward with probability 0.7 and backward with prob...

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  12. Three persons enter a lift and can leave the lift at any of the 8 floo...

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  13. In a group of 3 persons, if p is the probability that at least two of ...

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  14. Each coefficient in the equation ax^(2)+bx+c=0 is obtained by rolling ...

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  15. Out of 3n consecutive natural numbers m, m+ 1, m + 2, .., m + 3n – 1, ...

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  16. A student can pass test 1 with a probability of 3/4. For the next thre...

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  17. A bag contains three tickets numbered 1, 2 and 3. A ticket is drawn at...

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  18. The minimum number of times a fair coin needs to be tossed, so that th...

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  19. Three six-faced dice are thrown together. The probability that the sum...

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  20. There are n different objects 1, 2, 3, …, n distributed at random in ...

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