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  1. If y : x = 4 : 15, then the value of
    x - y
    		is
    x + y

    1. 11
      19
    2. 19
      11
    3. 4
      11
    4. 15
      19
Correct Option: A

y : x = 4 : 15
⇒ x : y = 15 : 4
By componendo and dividendo,

x - y
 =
15 - 4
 =
11
x + y15 + 419


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