There are 10 fictions and 6 non-fictions. How many cases are there such that 2 fictions and 2 non-fictions are selected from them?
Choose the correct choice from the following options:
A) 90	B) 120	C) 675	D) 180	E) 200
Number of ways of selecting 2 fiction books = 106752   Number of ways of selecting 2 non fiction books = 66752   106752 * 66752 = 45 * 15= 
<gadget id="calculator">45 * 15</gadget>
<output>675</output>
675   Answer: 675
<result>C</result>
There are 10 fictions and 6 non-fictions. How many cases are there such that 2 fictions and 2 non-fictions are selected from them?