How many different ways can you choose 3 frozen yogurt toppings from 20?

6,840
1,140
60*
2,260
I think it is 60 because 3*20 however not positive.

1 answer

Number of choices
= C(20,3) = 1140

or , the long way....

If we consider order, the number of permutations is
20 x 19 x 18 = 6840
but the order should not matter , and each a 3 yogurt choice can be arranged in 3x2x1 or 6 ways, so we have to divide the above by 6
number of ways to choose = 6840/6 = 1140