<u>Complete Question</u>
The table shows the number of grade 7 and grade 8 students on the student council at Jeremy’s school.
Number of Students
- Grade 7 - 17
- Grade 8 - 34
Answer:
C- The number of outcomes representing each grade level does not change after the first student is chosen.
Step-by-step explanation:
The ratio of Grade 7 students to Grade 8 students is:
17:34
This written in reduced form is 1:2
Therefore, initially, the six parts of the cube can be divided into the ratio 2:4 which Jeremy did.
However, after the first selection of a student, the ratio of Grade 7:Grade 8 student changes since the same student cannot be chosen more than once.
Therefore the cube rolls represent only the first student choice and may not be accurate for subsequent rolls.
The correct option is C.
First, we have to find the z scores of $4 and $9.50.
Z₁ = ($4 - $6.50)/$2.25 = -1.11
Z₂ = ($9.50 - $6.50)/$2.25 = 1.33
Then, using a z score table, we find the probability of 1.33 and -1.11, and subtract them to determine the probability in between.
0.9082 - 0.1335 = 0.7747 or 77.47%.
15
Step-by-step explanation:
A negative number being subtracted makes it positive
5 - -10
5+10 =15
