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 5 screws and 1 nails?
Choose the correct choice from the following answers.
A) a. 4 B) b. 5/2 C) c. 2 D) d. 3/2 E) 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 5s and 1n3 +3*4= 
<gadget id="calculator">3 +3*4</gadget>
<output>15</output>
15s..   and weight of 5s and 1n= 5s+1*5s=10s..   ratio5 +1*5= 
<gadget id="calculator">5 +1*5</gadget>
<output>10</output>
10s..   ratio= 15s/10s=15/10=3/2   d. 3/2
<result>D</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 5 screws and 1 nails?