In how many ways could you choose two different letters from the letters C, O, U, N, T?
A. 60 ways

B. 20 ways

C. 120 ways

D. 10 ways

Question

In how many ways could you choose two different letters from the letters C, O, U, N, T?
A. 60 ways
	
B. 20 ways
	
C. 120 ways
	
D. 10 ways

astrophysics · Answer

Does order matter?

astrophysics · Answer

I'm guessing it doesn't so you can use 5C2

astrophysics · Answer

So what this really means is $$\frac{ 5! }{ 2!(5-2)! }$$

imqwerty · Answer

total number of ways u can choose the 1st letter=5

no 1 letter got reduced 
we are left with 4 letters
so total number of ways to chose the second letter=4

now look at this example-|dw:1447850791641:dw|

so like this

total ways=5 x 4=20

astrophysics · Answer

wait no

astrophysics · Answer

Oh guess I was wrong :c

imqwerty · Answer

no wait

imqwerty · Answer

it depends
does the sequence count?
like do we consider CO and OC as diff?