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1972 AMC 12 Question 7

AMC12 · 1972 AMC 12

Question 7

If $yz:zx:xy=1:2:3,$ then $\dfrac{x}{yz}:\dfrac{y}{zx}$ is equal to:
  1. $3{:}2$
  2. $1{:}2$
  3. $1{:}4$
  4. $2{:}1$
  5. $4{:}1$