A reading list for a certain course consists of 10 books, of which 5 are poems and the rest are novels. Each student is required to read a selection of 4 books from the list, including at most 2 novels. How many selections of 4 books satisfy the requirements?
Choose the correct option
A) 90
B) 115
C) 130
D) 144
E) 155
Ans: B   Solution: Selection requires at most 2 novels, means=   0N4P + 1N3P + 2N2P   5c0*5c4+ 5c1*5c3 + 5c2*5c2   = 5+ 50 + 100= 
<gadget id="calculator">5+ 50 + 100</gadget>
<output>155</output>
155   Ans: 155
<result>E</result>
A reading list for a certain course consists of 10 books, of which 5 are poems and the rest are novels. Each student is required to read a selection of 4 books from the list, including at most 2 novels. How many selections of 4 books satisfy the requirements?