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3. In the adjoining figure, lines \( \mathrm { AB } \) and \( \mathrm { CD } \) intersect at \( \mathrm { If } \angle \mathrm { EFA } = \angle \mathrm { AFD } \) and \( \angle \mathrm { CFB } = 50 ^ { \circ } , \) find \( \angle \mathrm { EFC } \) . \( 1 \times 50 \)

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