Nails and screws are manufactured at a uniform weight per nail and a uniform weight per screw. If the total weight of one screw and one nail is half that of 6 screws and one nail, then the total weight of 3 screws, and 3 nails is how many times that of 4 screws and 2 nails?
Choose the most appropriate option:  A) 4  B) 5/2  C) 2  D) 3/2  E) 5/4
let the weight of nail be n and that of screw be s..   so s+w=1/2 * (6s+1n)...   or 1n = 4s..   lets see the weight of 3 s and 3n= 3s+3*4s=15s..   and weight of 4s and 2n3 +3*4= 
<gadget id="calculator">3 +3*4</gadget>
<output>15</output>
15s..   and weight of 4s and 2n= 4s+2*4s=12s..   ratio4 +2*4= 
<gadget id="calculator">4 +2*4</gadget>
<output>12</output>
12s..   ratio= 15s/12s=15/12=5/4   ANSW5/4R:5/4
<result>E</result>
Nails and screws are manufactured at a uniform weight per nail and a uniform weight per screw. If the total weight of one screw and one nail is half that of 6 screws and one nail, then the total weight of 3 screws, and 3 nails is how many times that of 4 screws and 2 nails?