Hal bought walnuts at 5 for $1 and apples at 4 for $1.He spent a total of $19.50 . He sells both at 20 for $5 and as a result gains $3 .How many walnuts did Hal buy ?
Choose the correct choice from the following.
A) 50	B) 45	C) 60	D) 80	E) 55
Let's start with the concrete information:   He buys everything for $19.50 and earns $3 after selling so he sells everything for $22.50 (= 2250 cents).   He sells each item for 5/20 = 25 cents so in all he sells   2250/25= 
<gadget id="calculator">  2250/25</gadget>
<output>90</output>
90 items   60ost of each walnut= 1/5= 
<gadget id="calculator">1/5</gadget>
<output>1/5 = around 0.2</output>
$.2= 20 cents   60ost of each apple = 1/4= 
<gadget id="calculator">1/4</gadget>
<output>1/4 = around 0.25</output>
$.25= 25 cents   Now we have one equation to solve:   20*w + 25*(90 - w) = 1950 (w is the number of walnuts he buys)   4w + 5(90 - w) = 390   w = 60   Answer (60)
<result>C</result>
Hal bought walnuts at 5 for $1 and apples at 4 for $1.He spent a total of $19.50 . He sells both at 20 for $5 and as a result gains $3 .How many walnuts did Hal buy ?