Abag contains 5 red marbles, 3 yellow marbles, and 2 blue marbles. once a marble is drawn, it is not replaced. what is the probability of drawing a blue on the first draw and a second blue marble on the next draw ?

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%