The average of 20 results is 65 and the average of other 65 results is 20 . what is the average of all the results?	Choose the correct option.
A) 30  B) 25  C) 48  D) 50  E) none

Rationale: "answer sum of 85 result = sum of 20 result + sum of 65 result . = 20 x 65 + 65 x 20 = 2600 correct option : a"
Answer: A