A Residential Building Contractor Borrowed $31,000 to Complete a New

Multiple Choice

A residential building contractor borrowed $31,000 to complete a new home.Some of the money was borrowed at 5%, some at 7%, and some at 9%.How much was borrowed at each rate if the annual interest owed was $2050 and the amount borrowed at 7% is three times more than the amount borrowed at 9%?

A) $9000 at 5%; $17,000 at 7%; $5000 at 9%
B) $11,000 at 5%; $15,000 at 7%; $5000 at 9%
C) $9000 at 5%; $16,000 at 7%; $6000 at 9%
D) $10,000 at 5%; $13,000 at 7%; $7000 at 9%
E) $9000 at 5%; $18,000 at 7%; $6000 at 9%