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Find the number of ways in which n disti...

Find the number of ways in which n distinct objects can be kept into two identical boxes so that no box remains empty.

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CENGAGE ENGLISH-PERMUTATIONS AND COMBINATIONS-All Questions
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  2. There are three coplanar parallel lines. If any p points are taken ...

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  3. Find the number of ways in which n distinct objects can be kept into t...

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  4. Two packs of 52 cards are shuffled together. The number of ways in w...

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  5. Find the number of positive integral solutions of x y z=21600.

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  6. A student is allowed to select atmost n books from a collection of (2n...

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  7. Find the number of positive integral solutions satisfying the equation...

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  8. There are (n+1) white and (n+1) black balls, each set numbered 1ton...

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  9. Roorkee University has to send 10 professors to 5 centers for its e...

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  10. Six cards and six envelopes are numbered 1, 2, 3, 4, 5, 6 and cards...

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  11. In how many ways, two different natural numbers can be selected, which...

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  12. Consider the set of eight vector V={a hat i+b hat j+c hat k ; a ,bc in...

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  13. The number of ways of selecting 10 balls from unlimited number of red,...

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  14. Let ngeq2 be integer. Take n distinct points on a circle and join each...

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  15. There are 5 historical monuments, 6 gardens, and 7 shopping malls in a...

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  16. Let n1ltn2ltn3ltn4ltn5 be positive integers such that n1+n2+n3+n4+n5="...

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  17. In an election, the number of candidates exceeds the number to be e...

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  18. A rectangle with sides of lengths (2n-1) and (2m-1) units is divided ...

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  19. Find the number of odd proper divisors of 3^pxx6^mxx21^ndot

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  20. lf r, s, t are prime numbers and p, q are the positive integers such t...

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