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The probability of selecting a green marble at random from a jar that contains only green, white and yellow marbles is `1//4` . The probability of selecting a white marble at random from the same jar is `1//3` . If this jar contains 10 yellow marbles. What is the total number of marbles in the jar?

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RD SHARMA ENGLISH-PROBABILITY -All Questions
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  2. The faces of a red cube and a yellow cube are numbered from 1 to 6....

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  3. The probability of selecting a green marble at random from a jar th...

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  4. There are 30 cards, of same size, in a bag on which numbers 1 to 30...

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  6. Find the probability that a number selected from the number 1 to 25...

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  7. A bag contains 8 red, 6 white and 4 black balls. A ball is drawn at ...

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  8. A bag contains lemon flavoured candies only. Malini takes out one c...

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  9. It is given that in a group of 3 students, the probability of 2 stu...

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

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

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

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

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

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

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  16. 12 defective pens are accidently mixed with 132 good ones. It is no...

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  17. Five cards – the ten, jack, queen king and ace of diamonds, are wel...

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  18. Five cards – the ten, jack, queen king and ace of diamonds, are wel...

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  19. Harpreet tosses two different coins simultaneously (say, one is of ...

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  20. Two dice,one blue and one grey, are thrown at the same time. Complete ...

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