Permutations and Combinations questions
785 published questions with worked solutions.
- In how many ways can 5 books be selected out of 10 books, if two specific books are never selected?
- The number of 5 digits numbers of the from abcba in which a<b, is
- Five balls of different colours are to be placed in three boxes of different sizes. Each box can hold all five balls. In how many...
- In an steamer there are stalls for 12 animals and there are hours, cows and calves (not less then 12 each) ready to be shipped in...
- The number of triangles that can be formed by 5 points in a line and 3 points on a parallel line is
- The number of five digits numbers that can be formed without any restriction, is
- Six points in a plane be joined in all possible ways by indefinite straight lines and if no two of them be coincident or...
- The number of ways can 10 letters be placed in 10 marked envelopes, so that no letter is in the right envelope are
- In how many ways can 5 keys be put in a ring?
- The total number of flags with three horizontal strips, in order, that can be formed using 2 identical red, 2 identical green and...
- There are n distinct points on the circumference of a circle. The number of pentagons that can be formed with these points as...
- The number of divisors of the number 38808 (excluding 1 and the number itself) is
- The number of ways in which mn students can be distributed equal among n sections, is
- A question paper is divided into two parts A and B and each part contain 5 questions. The number of ways in which a candidate can...
- The value of ^nP_r is equal to
- There are 3 men and 7 women taking a dance class. If N is number of different ways in which each man is paired with a woman...
- The number of three digit numbers having only two consecutive digits identical is N, then the value of (N/2)^ 1/2 is
- There are n distinct white and n distinct black balls. If the number of ways of arranging them in a row so that neighboring balls...
- Number of ways in which 7 people can occupy six seats, 3 seats on each side in a first class railway compartment if two specified...
- A man has 3 friends. If N is number of ways he can invite one friend everyday for dinner on 6 successive nights so that no friend...
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration