Question

Check my answer plz. Will give medal!

Four out of 9 performers will be chosen to stand in a row on stage. How many ways can the 4 performers stand in a row?

A.
362,880 ways

B.
347,760 ways

C.
15,120 ways

D.
3024 ways

Answer 1

@hartnn I think the answer is D. Am I right?

Answer 2

No C

Answer 3

D is correct :)

Answer 4

Really?

Answer 5

The answer is D. This is because for the first spot out of the four in the line there are nine possibilities. For the second spot out of the four in the line there are eight possibilities. For the third spot out of the four in the line there are seven possibilities. For the fourth spot out of the four in the line there are 6 possibilities. 9 x 8 x 7 x 6 = 3024. Hope this helps!

Answer 6

first we choose 4 out of 9 in 9C4 ways
then we can arrange those 4 in 4! ways , so 9C4 times 4!

Answer 7

Ok. Thanks everyone! :)