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Let X denote the number of hours you st...

Let X denote the number of hours you study during a randomly selected school day The probability that X can take the values x. has the following form, where k is some unknown constant.`P(X=x)={0. 1 if x=0,k x if x=1 , 2k(5-x) if x=3 or 4, 0 otherwise

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To solve the problem, we need to determine the value of the constant \( k \) in the given probability distribution and then find various probabilities related to the random variable \( X \). ### Step 1: Define the Probability Distribution The probability distribution is given as follows: \[ P(X = x) = ...
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NCERT-PROBABILITY-Solved Examples
  1. Let a pair of dice be thrown and the random variable X be the sum of ...

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  2. Let X denote the number of hours you study during a randomly selected...

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  3. Find the probability distribution of number of doublets m three throw...

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  4. Two cards are drawn successively with replacement from a well-shuffle...

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  5. A bag contains 2 white and 1 red balls. One ball is drawn at random a...

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  6. A person plays a game of tossing a coin thrice. For each head, he is ...

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  7. A man is known to speak truth 3 out of 4 times. He throws a die and r...

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  8. A doctor is to visit a patient. From the past experience, it is known ...

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  9. Two cards are drawn simultaneously (or successively without replaceme...

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  10. Six balls are drawn successively from an um containing 7 red and 9 bl...

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  11. If a fair coin is tossed 10 times, find the probability of(i)        ...

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  12. Ten eggs are drawn successively with replacement from a lot containin...

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  13. Coloured balls are distributed in four boxes as shown in the followin...

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  14. Find the mean of the Binomial distribution B(4,1/3).

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  15. The probability of a shooter hitting a target is 3/4. How many minimum...

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  16. A and B throw a die alternatively till one of them gets a 6 and wins ...

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  17. If a machine is correctly set up. it produces 90% acceptable items. If...

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  18. Prove that if E and F are independent events, then so are the events E...

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  19. A die is thrown. If E is the event ‘the number appearing is a multipl...

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  20. An unbiased die is thrown twice. Let the event A be odd number on the...

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