The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly copied. The first is 15 greater than the actual number and the second number added is 13 instead of 31. Find the correct average.
Choose the correct answer:  A) 40.2  B) 40.4  C) 40.5  D) 40.8  E) None of the above
Sum of 10 numbers = 402   40.5orrected sum of 10 numbers   = 402 – 13 + 31 – 15 = 405   Hence, new average = 405⁄10 = 40.5   Answer 40.5
<result>C</result>
The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly copied. The first is 15 greater than the actual number and the second number added is 13 instead of 31. Find the correct average.