During the year you must read 3 books for english class. you can choose from a list of 6 books. how many different sets of 3 books can you choose?

 120

Step-by-step explanation:

First book   and    Second Book       and      Third Book  

6 choices    x   5 remaining choices  x   4 remaining choices  =   120

If you want to use a formula:  

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

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tyuiop[]ghjkl;

step-by-step explanatio89