If (a + b) : c = 6 : 5, (b + c) : a = 9 : 2, then (a + c) : b = ?

In these type of questions always note that the total amount/ratio must be same in all conditions.

⇒ (a + b) : c = 6 : 5  = 11 (total)

⇒ (b + c) : a = 9 : 2 = 11 (total)

total equal is already equal,

Therefore,

a = 2, c = 5 & b = 11 -(2 +5) = 5

Here,

⇒ (a + c) : b = 7 : 5