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The total number of ways of selecting si...

The total number of ways of selecting six coins out of 20 one-rupee coins, 10 fifty-paisa coins, and 7 twenty-five paisa coins is a. `28` b. `56` c. `^37 C_6` d. none of these

A

28

B

56

C

`""^(37)C_(6)`

D

none of these

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OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Exercise
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  2. The total number of ways in which 2n persons can be divided into n ...

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  3. The total number of ways of selecting six coins out of 20 one-rupee...

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  4. The number of ways in which thirty five apples can be distributed amon...

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  5. A person goes for an examination in which there are four papers with a...

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  6. If m parallel lines in a plane are intersected by a family of n para...

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  7. 1, 2, 3, 4 are four numbers. How many numbers can be made using all fo...

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  8. There were two women participating in a chess tournament. Every par...

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  9. A parallelogram is cut by two sets of m lines parallel to its sides. T...

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  10. There are n straight lines in a plane in which no two are parallel and...

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  11. Out of 18 points in as plane, no three points are in the same straight...

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  12. Given 5 different green dyes, four different blue dyes and three diffe...

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  13. Eight chairs are numbered 1 to 8. Two women and three men wish to oc...

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  14. A student is allowed to select atlest one an atmost n books from a col...

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  15. In a steamer there are stalls for 12 animals and there are cows, horse...

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  16. The number of different numbers that can be formed by using all the di...

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  17. Number of ways in which RS. 18 can be distributed amongst four persons...

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  18. A box contains 2 white balls, 3 black balls & 4 red balls. In how many...

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  19. The number of ways in which four letters can be selected from the word...

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  20. find the number of arrangements which can be made out of the letters o...

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