Question

In how many ways can 2 different ice cream toppings be chosen from 12 available toppings?

Answer 1

@anlnt4 Do you know combinations?

Answer 2

we're learning them now, I think.
I know the answer, I just don't know how to get it.

Answer 3

What is the answer?

Answer 4

66

Answer 5

12 choices for the first topping, then 11 for the second topping so \(12\times 11\) exept that the the order you choose does not matter, so divide that by 2

Answer 6

in other words it is \(\frac{12\times 11}{2}=6\times 11=66\)

Answer 7

So anytime the order doesn't matter you'd divide it by the number you need?

Answer 8

Thanks!

Answer 9

yw