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A jar contains 40 balls , some are red a...

A jar contains 40 balls , some are red and the others are green . The probability of drawing a green balls is 2/5. Find the number of red balls in the jar.

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NAVNEET PUBLICATION-PROBABILITY-EXERCISE
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  2. There are 5 red and 3 green pens in a bag . There are 2 red and 6 gre...

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  3. A jar contains 40 balls , some are red and the others are green . The ...

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  4. A bag contains 50 balls . Some of them are white, some are blue and so...

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  5. Choose the correct alternative for each of the following questions: ...

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  6. A die is rolled. What is the probability of getting an even number on ...

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  7. Choose the correct alternative for each of the following questions: ...

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  8. Choose the correct alternative for each of the following questions: ...

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  9. Choose the correct alternative for each of the following questions: ...

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  10. Choose the correct alternative for each of the following questions: ...

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  11. A die is rolled . What is the probability that the number appearing on...

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  12. A die is rolled . What is the probability that the number appearing on...

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  13. A coin is tossed three times . What is the probability of getting no t...

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  14. Two coins are tossed simultaneously. What is the probability of gettin...

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  15. A card is drawn at random from a well- shuffled pack of 52 playing car...

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  16. A card is drawn at random from a well- shuffled pack of 52 playing car...

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  17. A card is drawn at random from a well- shuffled pack of 52 playing car...

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  18. Write the sample space S and the number of sample points n (S) for eac...

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  19. Write the sample space S and the number of sample points n (S) for eac...

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  20. Write the sample space S and the number of sample points n (S) for eac...

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