10 different biology books and 8 different chemistry books lie on a shelf. In how many ways can a student pick 2 books of each type? Choose the correct choice from the following choices:
A) 80	B) 160	C) 720	D) 1100	E) 1260
No. of ways of picking 2 biology books(from 10 books) = 10c2 = (10*9)/2= 
<gadget id="calculator">(10*9)/2</gadget>
<output>45</output>
45   No. of ways of picking 2 chemistry books(from 8 books)= 8c2 = (8*7)/2= 
<gadget id="calculator">(8*7)/2</gadget>
<output>28</output>
28   Total ways of picking 2 books of each type= 45*28= 
<gadget id="calculator">45*28</gadget>
<output>1_260</output>
1260   (Option 1260)
<result>E</result>
10 different biology books and 8 different chemistry books lie on a shelf. In how many ways can a student pick 2 books of each type?