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UPKAR PUBLICATION -PERMUTATION AND COMBINATION-QUESTION BANK
- Everybody in a room shakes hands with everybody else. The total number...
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- If ^(56)P(r+6):^(54)P(r+3)=30800 :1, find r.
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- IF ""^n C(r-1)=36, ""^nCr=84, "^n C(r+1)=126 then (n,r) is equal to
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- If .^(35)C(n+7)=.^(35)C(4n-2) then find the value of n.
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- IF ""^(2n+1)P(n-1):"^(2n-1) Pn=3:5 then n is equal to
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- The value of oversetnoverset Sigma overset(r=1)^(nPr/r!)is-
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- If^nPr=720^nCrthan the value r is-
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- If S = {2, 3, 4, 5, 7, 9}, then the number of different three-digit nu...
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- The number of triangles that can be formed by choosing the vefrom a se...
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- The middle term of [2x-(1)/(3x)]^(10) is -
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- The number of ways in which 5 boys and 5 girls can sit in a ring are--...
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- How many words of 4 consonants and 3 vowels is can be made from 12 con...
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- If ^nPr=120^nCr then r is equal to-
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- 12 persons are to be arranged to a round table. If two particular pers...
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- Seven wormen and seven men are to sit round a circular table such that...
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- The total number of permutations of 4 letters that can be made out of ...
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- The total number of selections of fruit which can be made from 3 banan...
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- The total number of arrangements of the letters in the expression a^(3...
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- A library has a copies of one book, b copies each of two books, ...
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- In how many different ways can the letters of the word PADDLED' be arr...
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