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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

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CENGAGE ENGLISH-PERMUTATIONS AND COMBINATIONS-All Questions
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  3. The total number of ways of selecting six coins out of 20 one-rupee ...

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  7. In a polygon, no three diagonals are concurrent. If the total number...

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  9. A man has three friends. The number of ways he can invite one frien...

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  10. The sum of all the numbers of four different digits that can be mad...

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  11. The sum of digits in the unit's place of all numbers formed with th...

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  14. Numbers from 1 to 1000 are divisible by 60 but not by 24 is .

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  15. If the number of ways in which the letters of the word ABBCABBC can...

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  16. A class has three teachers, Mr. P , Ms. Q, and Mrs. R and six stude...

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  18. The number of words of four letters containing equal number of vowe...

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  19. The number of ways in which we can select four numbers from 1 to 30...

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