Answer and Explanation
Your Answer is
Correct Answer is F
Explanation
According to the question stem, a/b=5/1, a=5b; b/c=9/1, b=9c; original formula=(2*9*5c+3*9c)/(4*9c +3c)=3, choose B
56. The ratio of a to b is 5 to 1, and the ratio of b to c is 9 to 1. What is the value of 
?