Hammers and wrenches are manufactured at a uniform weight per hammer and a uniform weight per wrench. If the total weight of 3 hammers and 4 wrenches is one-third that of 10 hammers and 5 wrenches, then the total weight of one wrench is how many times that of one hammer? Choose the correct choice from the following options:	A) 1/2	B) 2/3	C) 1	D) 3/2	E) 1/7
x be the weight of a hammer and y be the weight of a wrench.   (3x+4y)=1/3*(10x+5y)   3(3x+4y)=(10x+5y)   9x+12y=10x+5y   7y=x   y=x/7   Ans - 1/7
<result>E</result>
Hammers and wrenches are manufactured at a uniform weight per hammer and a uniform weight per wrench. If the total weight of 3 hammers and 4 wrenches is one-third that of 10 hammers and 5 wrenches, then the total weight of one wrench is how many times that of one hammer?