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If number of ways in which 7 identical b...

If number of ways in which 7 identical balls can be distributed into 4 boxes, so that no box remains empty is `4lamda`, the value of `lamda` is

A

5

B

7

C

9

D

11

Text Solution

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The correct Answer is:
A
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ARIHANT MATHS-PERMUTATIONS AND COMBINATIONS -Exercise For Session 6
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  2. If number of ways in which 7 different balls can be distributed into 4...

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  3. If number of ways in which 7 identical balls can be distributed into 4...

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  4. Number of non-negative integral solutions of the equation a+b+c=6 is a...

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  5. The number of integral solutions of x+y+z=0 with xgeq-5,ygeq-5,zgeq-5 ...

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  6. If a,b and c are integers and age1,bge2 and c ge 3. If a+b+c=15, the n...

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  7. Number of integral solutions of 2x+y+z=10 (xge0,yge0,Zge0) is

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  8. A person writes letters to six friends and addresses the corresponding...

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  9. The number of selections of four letters from the letters ofthe word A...

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  10. Find the number of solutions of 4{x}=x+[x].

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  11. If a,b, and c are positive integers such that a+b+cle8, the number of ...

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  12. The total number of positive integral solution of 15 < x1+x2+x3<=20 is...

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  13. Find the sum of all 2 digits no. which when divided by 9, it leaves a ...

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  14. There are 12 points in a plane in which 6 are collinear. Number of dif...

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  15. 4 points out of 11 points in a plane are collinear. Number of differen...

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  16. The number of triangles that can be formed with 10 points as vertice...

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  17. ABCD is a convex quadrilateral and 3, 4, 5, and 6 points are marked ...

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  18. There are 10 points in a plane of which no three points are collinea...

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  19. 4 points out of 8 points in a plane are collinear. Number of different...

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  20. There are 2n points in a plane in which m are collinear. Number of qua...

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