Your Answer is

Correct Answer is C

Explanation

First of all, because the mode of the data is 15, it can be known that at least one of XY is 15, so the arrangement of the five data is known to be 15, 15, 30, 35, 41, and because the median is 25, And there is an even number of data, so we know that the average of the fourth largest 30 and the third largest number is 25; and because the average of 15 and 30 is not 25, we can know that there is another number between 15 and 30, That is 20, because the average of 20 and 30 is 25; so the sum of the data is 15+15+20+30+35+41=156, and then divide 156 by 6 to get the average