Equal weights of two alloys containing tin, copper and lead in the ratio 3:2:5 and 4:5:3 are melted and mixed together. What is the ratio of tin, copper and lead in the resultant alloy?
Pick one:
A) 41:81:37
B) 33:91:81
C) 17:28:27
D) 38:37:45
E) 41:86:89
Let the weight of the two alloys be w each   Required ratio =   (3w/10 +4w/12): ( 2w/10+5w/12 ): (5w/10+3w/12)   = 38w/60 : 37w/60 : 45w/60   = 38:37:45   ANSWER:38:37:45
<result>D</result>
Equal weights of two alloys containing tin, copper and lead in the ratio 3:2:5 and 4:5:3 are melted and mixed together. What is the ratio of tin, copper and lead in the resultant alloy?