Question

Is my answer right again ?

Answer 1

NOpe

Answer 2

Can you tell me the formula ?

Answer 3

(9 choose 3)

Answer 4

You forgot that the order doesn't make any difference.

Answer 5

the answer is 27

Answer 6

because 9 times 3=27

Answer 7

The answer is NOT 27

Answer 8

why?

Answer 9

if it's not 27, then it must be 3

Answer 10

(9 - 3)! / 9!

Answer 11

There are 3! = 3*2*1 = 6 ways to choose 3 items from a total set of 3 (assuming order matters)

So because overall order doesn't matter, this means that there are 6 different copies of the same combos. So essentially you are over-counting by a factor of 6. To correct this, you have to divide by 6.

Answer 12

You have 9 choices for the first veggie, 8 for the second veggie, and 7 for the third veggie. That is 9 x 8 7 which is 504. BUT there are 3! arrangements of your three choices so divide that answer by 3! or 6

Answer 13

84

Answer 14

Bingo

Answer 15

Thank you, mertsj.

Answer 16

combinations of n things taken r at a time = n!/r!(n-r)!

9*8*7/3*2*1=84

Answer 17

yw