Mrs. Baker’s students write word problems for homework. Each week she selects one student's word problem to display on a bulletin board. Each student's name is placed in a bag from which Mrs. Baker draws a name. What is the probability that an eighth grade student will NOT be selected? Explain full process and give the answer as a % or simplified fraction.
To calculate the probability of an eighth grade student not being selected, we first need to determine how many students are in the class and how many of them are in eighth grade.
Let's say there are a total of 30 students in the class and 10 of them are in eighth grade.
The probability of selecting an eighth grade student is 10/30 = 1/3.
Therefore, the probability of not selecting an eighth grade student is 1 - 1/3 = 2/3.
To convert this to a percentage, we multiply 2/3 by 100:
(2/3) * 100 = 66.67%
Therefore, the probability that an eighth grade student will not be selected is 66.67%.