Susan has four apples. How many ways can she eat one or more apples?
Choose one:
A) 15 B) 44 C) 38 D) 12 E) 23
Susan can eat one or more of four apples   = &gt; 2 ^ 4 -1 = 15   15
<result>A</result>
Susan has four apples. How many ways can she eat one or more apples?