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What is the probability that a number selected at random from the number `1,\ 2,\ 2,\ 3,\ 3,\ 3,\ 4,\ 4,\ 4,\ 4` will be their average?

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RD SHARMA ENGLISH-PROBABILITY -All Questions
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  8. Find the probability that a number selected from the number 1 to 25...

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  12. A bag contains 3 red balls and 5 black balls. A ball is drawn at ra...

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  13. A box contains 5 red marbles, 8 white marbles and 4 green marbles. ...

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  14. A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at ra...

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  15. A lot of20 bulbs contain 4 defective ones. One bulb is selected at ran...

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  16. A box contains 90 discs which are numbered from 1 to 90. If one dis...

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  17. A lot consists of 144 ball pens of which 20 are defective and other...

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