# Problem #1220

 1220 The ratio of Mary's age to Alice's age is $3:5$. Alice is $30$ years old. How old is Mary? $\mathrm{(A) \ } 15\qquad \mathrm{(B) \ } 18\qquad \mathrm{(C) \ } 20\qquad \mathrm{(D) \ } 24\qquad \mathrm{(E) \ } 50$ This problem is copyrighted by the American Mathematics Competitions.
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