What number does not belong and why?

1/2
5/3
2/10
2/5

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Which of the functions graphed below has a removable discontinuity?