Question

Evaluate: 7C5
21
35
12
42

Answer 1

What type of math is this?

Answer 2

\[c=\frac{ n! }{ (n-r)!r! }\]
here n=7 and r=5 and ! stands for factorial!!

Answer 3

statistics!

Answer 4

answer is coming 21

Answer 5

@ProgramGuru can you help me on my latest question? Happy Thanksgiving all!

Answer 6

can you show the work?

Answer 7

@PedroSoccer do u mean ur radical expression one???

Answer 8

yes

Answer 9

yes :-)

Answer 10

\[\frac{ 7*6*5! }{ 2!*5! }\]
now cancel 5!
we get
\[\frac{ 7*6 }{ 2 }\]
which is equal to 21!!

Answer 11

where did the 2 come from?

Answer 12

2!=1*2

Answer 13

and (7-5)!=2!

Answer 14

thank you soooooo very much!