Question

permutations: how many different groups of four letters can be made from the letters A-F (6 letters) if letters can only be used once?

Answer 1

hi! can I help you??

Answer 2

@soapia

Answer 3

yes!

Answer 4

oh thanx

Answer 5

In a combination, the order doesn't matter. This is like drawing 5 cards for a poker hand. You can arrange them how you want once you have them. Or a lottery ball problem. You can match the balls, regardless of what order they were drawn. Or rolling 5 dice

Answer 6

When you have n things to choose from ... you have n choices each time!

When choosing r of them, the permutations are:

n × n × ... (r times)

(In other words, there are n possibilities for the first choice, THEN there are n possibilites for the second choice, and so on, multplying each time.)

Answer 7

So I think, to find the answer its a easy go! right

Answer 8

i think this is a combination without repetition

Answer 9

\[6!\quad =6\quad *\quad 5*\quad 4*\quad 3*\quad 2\quad *1=\quad 720\\ you\quad can\quad do\quad \it now!\]

Answer 10

P(6,6) = 6! / (6 - 6)! = 720

Answer 11

that is not a permutation because here we r talking about subsets

Answer 12

that question has not meaning to me
there will be only a subset of 4 letters because to make the another subset u need necessarily to repeat e letters or more