The average of 25 results is 8. The average of first 12 of them is 14 and that of last 12 is 17. Find the 13 result?  Choose the correct choice from the following options:  A) 52  B) 68  C) 78  D) 92  E) 65
13th result = sum of 25results - sum of 24 results   18*25-14*12+17*12 = 78   Answer is 92
<result>D</result>
The average of 25 results is 8. The average of first 12 of them is 14 and that of last 12 is 17. Find the 13 result?