If a: b = 7: 5, b: c = 9: 11, find a: b: c?  Pick one.
A) 63: 14: 55  B) 63: 45: 55  C) 14: 14: 15  D) 7: 14: 15  E) 9: 12: 17
Explanation:   a: b = 7: 5   b: c = 9: 11   a: b: c = 63: 45: 55   ANSWER IS 63: 45: 55
<result>B</result>
If a: b = 7: 5, b: c = 9: 11, find a: b: c?