If matches having zero runs and the one with highest runs is ignored, what will be the average runs for opener C?

As per given graph in the question,
Highest run scored by C = 52
Total run scored by C = 414
Number of match played by C if matches having zero runs and the one with highest runs is ignored = 20 - 1 - 2 = 17
Total runs scored by C if matches having zero runs and the one with highest runs is ignored = 414 - 0 - 52 = 362
Average runs of C = 362 / 17 = 21.29