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How many combinations can you make with 3 toppings?

Ice Cream: Vanilla/ Chocolate/ Strawberry/ Coffee

Toppings: Fudge/ Caramel/ Chocolate Sprinkles/ Rainbow Sprinkles/ Nuts

there are C(5,3) or 10 combinations to choose 3 toppings from 5

If your questions is, "How many different ice cream cones can you have with three toppings"?
then it would be 3 x C(5,3) or 30

How did you figure out the 30 and what does the c stand for?

Also what is the (5,3); I didn't learn that yet.

Sorry Alexia, should have noticed the "7th grade"

Suppose we use F,C,S,R, and N for the different toppings.
Now we want to form groups of 3 where the order does not matter.

so
FCS
FCR
FCN
FSR
FSN
FRN
CSR
CSN
CRN
SRN
There are 10 of these. Can you think of any more?
Now to the icecream.
there are 3 flavours, so each of the above 10 can be put on 3 different flavours, which give me 3x10 or 30

The notation C(5,3) you will learn in highschool, the C stands for Combinations, and the 5,3 means "choose 3 from 5"

For some extra "fun" you might look up Pascal's triangle, where numbers are arranged in the following pattern

1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1

the first column is all 1's
the second column is the counting numbers.
A new number is found by adding the one directly above and the one to the left of that
e.g. the 10 came from the 6 above it + the 4 to the left of the 6
Neat??

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