Question

(help)You are choosing numbers from the set S = {A, B, C, D, E, F, G, H}.

Let x = the number of ways to choose 3 letters from S without replacement (order doesn’t matter).

Which option below is equivalent to x?

The number of ways to choose 4 letters from S without replacement
The number of ways to choose 5 letters from S without replacement
The number of ways to choose 6 letters from S without replacement
The number of ways to choose 7 letters from S without replacement

Answer 1

HI!!

Answer 2

choosing 3 out of 8 to include is the same as choosing 5 our of 8 to exclude

Answer 3

huh?

Answer 4

so b?

Answer 5

can you help me out