Question

There are 9 items at the salad bar.


How many ways can Gwen select 3 items from the salad bar?









A.
3







B.
27







C.
84







D.
504










Question Resources

Answer 1

@Arnab09 @ikatouni

Answer 2

do you know combination?

Answer 3

go through that topic carefully, you can easily understand then it's 9C3 = 84

Answer 4

\[9-3=6~~~~~~~so,\]\[\color{red}{ \frac{9!}{3! \times 6!} }\]
\[9!=6! \times 7 \times 8 \times 9\]
and 6! cancels. YOU HAVE LEFT.\[\color{red}{ \frac{7 \times 8 \times 9}{1 \times 2 \times 3} }\]

Answer 5

\[7 \times 4 \times 3=84\]