Asked by Skye

An ice cream shop offers 7 toppings. How many 4-topping ice cream sundaes can you make?

A)11
B)28
C)30 <-- My answer
D)35

Answers

Answered by Damon
combinations of 7 taken 4 at a time
C(7,4) = 7! /[ 4!(3!)]

= 7*6*5/(3*2) = 35
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