Question

What is the value of 12C4 ? A) 11,880 B) 792 C) 495 D) 48

Answer 1

use the formula :
nCr = n!/r!(n-r)!

in this case n=12 and r=4

Answer 2

so would it be 12*11*10*9?

Answer 3

then divide by 4!

Answer 4

4! = 4 * 3 * 2 * 1 = 24

Answer 5

oh ok i think i got it! kinda haha ,do you have time for another one?

Answer 6

i'll try if i can :)

Answer 7

B

Answer 8

you are wrong, BigNasty
have you done before ?

Answer 9

Kathi can choose 1 snack from a box containing 6 different granola bars, 4 different kinds of fruit, and 2 different kinds of chips. How many ways can Kathi choose a snack?
a)100

b) 26

c) 20

d) 12

Answer 10

It's an attempt

Answer 11

addition rule :
6+4+2=12

Answer 12

because just choose 1 snack

Answer 13

yep i got that one corrrecwhat about this one?
What is the value of (8 - 4)! ?
a)6

24

5040

40,296

Answer 14

8-4=4
so, 4! = 4 * 3 * 2 * 1 = ...

Answer 15

24