15 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 answers:
A) 80
B) 160
C) 720
D) 2100
E) 2940
No. of ways of picking 2 biology books(from 15 books) = 15c2 = (15*14)/2= 
<gadget id="calculator">(15*14)/2</gadget>
<output>105</output>
105   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= 105*28= 
<gadget id="calculator">105*28</gadget>
<output>2_940</output>
2940   (Option 2940)
<result>E</result>
15 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?