The average of 10 numbers is calculated as 46. It is discovered later on that while calculating the average, the number 65 was incorrectly read as 25, and this incorrect number was used in the calculation. What is the correct average?  Choose the correct choice from the following answers: A) 48 B) 50 C) 54 D) 66 E) 86

Rationale: "the total sum of the numbers should be increased by 40 . then the average will increase by 40 / 10 = 4 . the correct average is 50 . the answer is b ."
Answer: B