Question

If A : B = 7 : 5 and B : C = 9 : 11, then A : B : C is equal to

• A. 55:45:63
• B. 63:45:55
• C. 45:63:55
• D. None of these

Answer 1

Answer: (B)

63:45:55

$A:B=7:5B:C=9:11$

Let $A=7p,B=5pB=9q,C=11q\because 5p=99\therefore p=\frac{99}{5}\therefore A=7\times \frac{99}{5}=\frac{639}{5}\therefore A:B:C=\frac{639}{5}:9q:11qA:B:C=63:45:55$

Option B