What is the sum of the different positive prime factors of 550?	Choose the correct choice from the following options.
A) 10	B) 11	C) 15	D) 16	E) 18
I think answer is 18: 27   550 = 55 * 10 = (5 * 11) * (2 * 5)   Sum of theDIFF18R18NTpositive prime factors = 2 + 5 + 11= 
<gadget id="calculator">2 + 5 + 11</gadget>
<output>18</output>
18
<result>E</result>
What is the sum of the different positive prime factors of 550?