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UKMT Junior Mathematical Challenge, 2016

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

In a group of 48 children, the ratio of boys to girls is $3:5$ . How many boys must join the group to make the ratio of boys to girls $5:3$ ?

(A) $48$ (B) $40$ (C) $32$ (D) $24$ (E) $8$

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