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The number of non-negative integral solu...

The number of non-negative integral solution `x_1 + x_2 + x_3 + x_4 <=n` (where n is a positive integer) is :

A

`""^(n+3)C_(3)`

B

`""^(n+4)C_(4)`

C

`""^(n+3)C_(n)`

D

`""^(n+4)C_(n)`

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The correct Answer is:
B, D
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AAKASH INSTITUTE ENGLISH-PERMUTATIONS AND COMBINATIONS -Assignment Section C Objective type questions (One option is correct )
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  8. If N is the number of positive integral solutions of x1x2x3x4 = 770, t...

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  9. There are n white and n black balls marked 1, 2, 3,…..,n. The number o...

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  10. There are 15 bulbs in a room. Each one of them can be operated indepen...

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  13. Find the number of integers which lie between 1 and 10^6 and which hav...

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  14. The value of sum(r=0)^(m)""^(n+r)C(n) is equal to :

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