Equal weights of two alloys containing tin, copper and lead in the ratio 1:2:3 and 4:5:3 are melted and mixed together. What is the ratio of tin, copper and lead in the resultant alloy?
Options
A) 41:81:37
B) 3:9:8
C) 1:2:2
D) 6:4: 9
E) 4:8:9
Let the weight of the two alloys be w each   Required ratio =   (1w/6 +4w/12): ( 2w/6 +5w/12 ): (3w/6+3w/12)   = 6w/12 : 4w/12 : 9w/12   = 6:4: 9   ANSWER:6:4: 9
<result>D</result>
Equal weights of two alloys containing tin, copper and lead in the ratio 1:2:3 and 4:5:3 are melted and mixed together. What is the ratio of tin, copper and lead in the resultant alloy?