A student surveyed 100 students and determined the Let A be the event that the student takes statistics and number of students who take statistics or calculus among B be the event that the student is a senior.
seniors and juniors. Here are the results.
What is P(A or B)?
Type of Class
0.18
Statistics Calculus
0.68
Senior
15
35
0.82
Class
Junior
18
32
0.97

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%

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

What percent of 18 is 24? and plz explain thx.