Mrs. Baker’s students write word problems each week, and she selects one student's word problem to display on a bulletin board each week. 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?

Question

EXPLAIN your process and give your answer as a % or simplified fraction.
student and grade
Arthur 7
jeff 6
anita 7
mitara 8
saree 8
bryan 7
micheal 8
susanna 6
maria 6

Answer 1

There are a total of 8 students, out of which 3 are in the eighth grade. Therefore, the probability of an eighth-grade student being selected is 3/8.

To find the probability that an eighth-grade student will NOT be selected, we subtract the probability of selecting an eighth-grade student from 1:

1 - 3/8 = 5/8

So, the probability that an eighth-grade student will NOT be selected is 5/8 or 62.5%.

Answer 2

are you sure? and by the way its 9 students not 8

Answer 3

Let me recalculate considering 9 students in total:

There are a total of 9 students, out of which 3 are in the eighth grade. Therefore, the probability of an eighth-grade student being selected is 3/9 = 1/3.

To find the probability that an eighth-grade student will NOT be selected, we subtract the probability of selecting an eighth-grade student from 1:

1 - 1/3 = 2/3

So, the probability that an eighth-grade student will NOT be selected is 2/3 or approximately 66.67%. Thank you for pointing out the correction in the total number of students.

Answer 4

how did we come up with the percentage?

Answer 5

To convert the fraction 2/3 into a percentage, you can divide the numerator by the denominator and then multiply by 100:

2 ÷ 3 = 0.6667

0.6667 x 100 = 66.67%

Therefore, the probability that an eighth-grade student will NOT be selected is 66.67%.