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If A:B = 4:9 and A:C = 2:3, then (A+b): (A+C) is

A15:13

B10:13

C13:10

D13:15

Answer:

C. 13:10

Read Explanation:

(A/B)+(A/C)=C/B (4/9)+(2/3)=2/3 B:C=3:2 A:B:C = 4x3:3x9:9x2 = 12:27:18 (A+B)/(A+C)=(12x+27x)/(12x+18x) =39x/30x=13:10 13:10


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