Question

if a : (b+c)=1 : 3 and c:(a+b)=5 : 7 then b : (a+c) is equal to ??
option
1-1 :2
2- 2 : 3
3- 1:3
4- 2:1

Answer 1

From the rules of ratio and proportions, you get b:(a+c) = 1:2

Answer 2

answer is option 1, 1:2