7C4 = 7*6*5*4/4! = 35
There are 28 2-topping sundaes
An ice cream shop offers the toppings shown below. How many 4-topping ice cream sundaes can you make?
chocolate chips
walnuts
strawberry sprinkles
caramel
hot fudge
whipped cream
gummy bears
11
28 **
30
35
4 answers
7!/4!3!
7* 6* 5 * 4* 3 *2 *1 divided by
4*3* 2* 1* 3*2*1
You can cancel like factors
7(6)5) divided by (3)2 = 35
7* 6* 5 * 4* 3 *2 *1 divided by
4*3* 2* 1* 3*2*1
You can cancel like factors
7(6)5) divided by (3)2 = 35
thank you
thank you