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UKMT Junior Kangaroo, 2021

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

The ratio $a : b : c = 2 : 3 : 4$ . The ratio $c : d : e = 3 : 4 : 5$ . What is the ratio $a : e$ ?

(A) $1:10$ (B) $1:5$ (C) $3:10$ (D) $2:5$ (E) $1:2$

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