If x : y = 3 : 5, then the value of $$\frac{(5x-3y)}{( 10x + 6y)}$$​ is:

Correct option is C

Given:
ratio x : y = 3 : 5
Solution:
Let's assume x = 3k and y = 5k, where k is a constant.
Now, substitute these values in the given expression:
 = $$\frac{(5x - 3y)}{ (10x + 6y)}$$​

= $$\frac{(5(3k) - 3(5k))} { (10(3k) + 6(5k))}$$​

= $$\frac{(15k - 15k)} { (30k + 30k)}$$​

= $$\frac{0} { 60k}$$​= 0 ​​​​​