Permutation: Each of the arrangements, which can be made by taking, some or all of a number of things, is called a “Permutation”.
The different arrangements of a given number of things by taking some or all at a time.
Permutation will cover the basic concepts and easy to solve. Test conducted to know the logical thinking capacity of a person.
Ex: Format of numbers, word formation, sitting arrangement in a row.
The number of permutations of ‘n’ things taken ‘r’ at a time is denoted by ncr=n! / (nr)!
Combination: Each of the different selections that can be made with a given number of objects taken some or all of them at a time is called as a “Combination”.
Combination will cover the basic concepts and easy to solve. Test conducted to know the logical thinking capacity of a person.
Ex: Various groups of 2 out of four persons A,B,C,D are AB,AC,AD,BC,BD,CD.
Permutation and Combination problems are very useful for all competitive exams.
