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CENGAGE PUBLICATION-PERMUTATIONS AND COMBINATIONS-All Questions
- In how many different ways can 3 persons A, B, C having 6 one-rupee ...
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- If 6x + 5y – 7 = 0 and 2px + 5y + 1 = 0 are parallel lines, find the v...
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- In how many ways 3 boys and 15 girls can sits together in a row such ...
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- If the lines y = 3x + 7 and 2y + px = 3 perpendicular to each other, f...
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- If the 11 letters A, B, ..., K denote an arbitrary permutation of he ...
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- In how many ways can four people, each throwing a dice once, make a su...
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- If the straight lines kx – 5y + 4 = 0 and 4x – 2y + 5 = 0 are perpendi...
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- In how many ways can 5 girls and 3 boys be seated in a row so that no ...
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- If 9^(th) term of an A.P. is zero, prove that its 29^(th) term is doub...
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- In how many ways can four people, each throwing a dice once, make a su...
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- Find n ,if(n+1)! =12xx(n-1)!dot
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- Three numbers are in AP. If theirsum is 27 and their product is 648. F...
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- Find the total number of integers 'n' such that 2 le n le 2000 and ...
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- The number of polynomials of the form x^3 + ax^2 + bx + c which are di...
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- Find the number of diagonals in a polygon with n sides.
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- Find the total number of n -digit number (n >1) having property that n...
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- Prove that (n !)^2 < n^n n! < (2n)!, for all positive integers n.
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- Find the sum of the series sum(r=1)^n r/((r+1) !)dot
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- Find the exponent of 80 in 200!.
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- Prove that .^nPr = ^(n-1)Pr + r^(n-1)P(r-1)
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