Question

9 students volunteer for a committee. How many different 7-person committees can be chosen?

Answer 1

9 C 2 -> which is:

9! / [(7!)(2!)] which is:

(9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) / [(7 x 6 x 5 x 4 x 3 x 2 x 1)(2 x 1)]

which is:

(9 x 8) / 2 -> 36

Answer 2

All good now, @katmole ?

Answer 3

thanks!

Answer 4

uw! Good luck to you in all of your studies and thx for the recognition! @katmole