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3. Triangle ABC has a right angle at c, ...

3. Triangle ABC has a right angle at c, AC=3 and Bc=4. Triangle ABD has a right angle at A and AD= 12, Points c and D are on opposite sides of AB The line through D parallel to AC meets CB extended at E. If DE/DB=m/n, where m and n are relatively prime positive integers, then m+n =(A)25(B)128(C)153(D)243(E)256

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