need explanation

QUESTION 8 A data set of 51 distinct values had the following mean and median: mean = 200 and median = 175. The largest value of the data set was 500. Later it was found that this largest entry was typed incorrectly. The correct value is 255. What is the effect on the median and mean if the correction is made? O a. The mean would remain the same while the median would decrease. O b. Both the mean and median would decrease, O c. Both the mean and median would remain the same. O d. The mean would decrease while the median would remain the same