On a class trip, there were 45 more girls than boys. the total number of students on the trip was 215. write and solve an equation to find the number of girls and boys on the class

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%

Ineed with the quizzes in apex mathematics ii

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0