If x : y = 2 : 5, then what is (2x + 3y) : (x + y)?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 19 : 7.
Let x = 2k, y = 5k
(2x + 3y) : (x + y)
= (2 × 2k + 3 × 5k) : (2k + 5k)
= (4k + 15k) : (2k + 5k)
= 19k : 7k
= 19 : 7