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If 15Cr :15C(r-1)=11 :5 find r....

If 15Cr :15C(r-1)=11 :5 find r.

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If ^15 C_(3r):^(15)C_(r+1)=11 :3 , find the value of rdot

If ^15 C_(3r):^(15)C_(r+1)=11 :3 , find the value of rdot

If .^(15)C_(r): .^(15)C_(R-1) = 11:5 , then find the value of 'r'.

If .^(15)C_(r): .^(15)C_(r-1) = 1:5 , then find r.

If .^(n+1)C_(r+1.): ^nC_r: ^(n-1)C_(r-1)=11:6:3 find the values of n and r.

If \ ^(15)C_(3r)=\ ^(15)C_(r+3) , find \ rdot

If .^(15)C_(3r)=.^(15)C_(r+3), find .^(r)C_(2) .

If .^(n+1)C_(r+1) :^n C_r :^(n-1)C_(r-1)=11 :6:3, then n r=? a. 20 b. 30 c. 40 d. 50

If .^(n+1)C_(r+1):^n C_r:^(n-1)C_(r-1)=11 :6:3, then n r= 20 b. 30 c. 40 d. 50

If .^(n+1)C_(r+1):^(n)C_(r):^(n-1)C_(r-1)=11:6:3 , find the values of n and r.

RD SHARMA ENGLISH-COMBINATIONS-All Questions
  1. If \ ^(24)Cx=\ ^(24)C(2x+3) find x

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  2. If \ ^(15)C(3r)=\ ^(15)C(r+3), find \ rdot

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  3. If 15Cr :15C(r-1)=11 :5 find r.

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  4. If \ ^(28)C(2r):\ ^(24)C(2r-4)=225 : 11 , find r

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  5. if C(2n,3):C(n,2)=44:3 find n

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  6. If alpha=\ \ ^4 C2,\ then find the value of \ ^(alpha)C2dot

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  7. For all positive integers n , show that \ ^(2n)Cn+\ ^(2n)C(n-1)=1/2(\ ...

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  8. From a class of 32 students, 4 are to be chosen for a competition. In ...

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  9. Three gentlemen and three ladies are candidates for two vacancies. A ...

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  10. If there are 12 persons in a party, and if each two of them shake hand...

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  11. A question paper has two parts, Part A and party B each containing 10 ...

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  12. In how many ways a committee of 5 member can be selected from 6 men an...

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  13. A committee of 3 persons is to be constituted from a group of 2 men...

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  14. What is the number of ways of choosing 4 cards from a pack of 52 pl...

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  15. Out of 5 men and 2 women, a committee of 3 is to be formed. In how man...

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  16. For the post of 5 teachers, there are 23 applicants, 2 posts are re...

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  17. How many triangles can be formed by joining the vertices of a hexagon?

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  18. A polygon has 44 diagonals. The number of its sides are

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  19. From a class of 25 students, 10 are to be chosen for an excursion p...

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  20. In how many ways can 7 plus (+) and 5 minus (-) signs be arranged in a...

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