The average of 25 results is 19. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?
Choose the most appropriate option:
A) 74 B) 75 C) 103 D) 78 E) 45

Rationale: "solution : sum of 1 st 12 results = 12 * 14 sum of last 12 results = 12 * 17 13 th result = x ( let ) now , 12 * 14 + 12 * 17 + x = 25 * 19 or , x = 103 . answer : option c"
Answer: C