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The probability distribution of a random...

The probability distribution of a random variable X is given as under:
`P(X=x)={(kx^2, fo r (x=1,2,3,4)),(2kx, fo r(x=5,6,7)),(0, otherwise):}` where k is a constant. Calculate
`P(Xge4)`

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE
  1. Let X be a discrete random variable whose probability distribution is ...

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  2. Let X be a discrete random variable whose probability distribution is ...

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  3. The probability distribution of a random variable X is given as under:...

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  4. The probability distribution of a random variable X is given as under:...

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  5. The probability distribution of a random variable X is given as under:...

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  6. A discrete random variable X has the following probability distributio...

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  7. A discrete random variable X has the following probability distributio...

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  8. A discrete random variable X has the following probability distributio...

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  9. A discrete random variable X has the following probability distributio...

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  10. A discrete random variable X has the following probability distributio...

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  11. Three numbers are selected at random (without replacement) from first ...

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  12. Three numbers are selected at random (without replacement) from first ...

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  13. A dice is thrown 120 times and getting '1' or '5' is considered a succ...

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  14. Find the mean and the variance of random variable X which is the numbe...

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  15. Find the mean and variance of the number of heads on the throw of thre...

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  16. An unbiased coin is tossed 4 times. Find the mean and variance of the ...

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  17. An unbiased coin is tossed 4 times. Find the mean and variance of the ...

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  18. Ten coins are thrown simultaneously. Find the probability of getting a...

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  19. A dice is rolled thrice. If getting a four is considered a success, fi...

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  20. Two cards are drawn with replacement from a well shuffled deck of 52 c...

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