Subject: mathqa
Question: the average of 10 numbers is 40.2 . later it is found that two numbers have been wrongly copied . the first is 14 greater than the actual number and the second number added is 13 instead of 31 . find the correct average .
Option: 
A: none of the above
B: 40.2
C: 40.6
D: 40.4
Answer: C