Question

can anyone explain me the permutation and combinations..?.. please.. tnx....

Answer 1

do you have a specific problem to start with ? :)

Answer 2

how many 5 digit number can be formed without repeating any digit from the following digits: 1,2,3,4,5 and 6

Answer 3

thats an interesting example, lets start by considering a much simpler problem :

how many 2 digit number can be formed without repeating any digit from the following digits: 1,2,3,4,5 and 6

Answer 4

how many choices are there for first digit ?

Answer 5

5 1 guess

Answer 6

okie, what are the choices ?

Answer 7

23456

Answer 8

?

Answer 9

may i knw why u dropped the digit "1" ?

Answer 10

actually the first digit can be any one of {1, 2, 3, 4, 5, 6}
so the first digit has a total of `6` choices