The mean of 30 values was 150. It was detected on rechecking that one value 165 was wrongly copied as 135 for the computation of the mean. Find the correct mean.  Choose the correct choice from the following answers:
A) 151 B) 149 C) 152 D) 148 E) none of the above

Rationale: "corrected mean = 150 × 30 − 135 + 165 / 30 = 4500 − 135 + 165 / 30 = 4530 / 30 = 151 answer a"
Answer: A