If x ∶ y = 2 ∶ 1, find the value of (2x + 3y) ∶ (4x + 7y)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 7 : 15.
Let x = 2k and y = k
(2x + 3y) : (4x + 7y)
= [2(2k) + 3(k)] : [4(2k) + 7(k)]
= 7k : 15k
= 7 : 15