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UKMT Intermediate Mathematical Challenge, 2016

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

Tegwen has the same number of brothers as she has sisters. Each one of her brothers has 50% more sisters than brothers. How many children are in Tegwen's family?

(A) $5$ (B) $7$ (C) $9$ (D) $11$ (E) $13$

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