Answer: B iis the answer
Step-by-step explanation:
Answer:
you have to divide 12 by 15
Step-by-step explanation:
Answer:
5 students.
Step-by-step explanation:
We have been given that there are 440 students at Thomas Paine high school enrolled in U.S. history. On the April report card, the students’ grades are approximately normally distributed with a mean of 79 and a standard deviation of 7. Students who earn a grade less than or equal to 62.9 must attend summer school.
To find the number of students who must attend summer camp let us find x-score for our given sample score 62.9.
, where,
= Sample score,
= Mean,
= Standard deviation.
Upon substituting our given values in z-score formula we will get,
![z=\frac{-16.1}{7}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B-16.1%7D%7B7%7D)
![z=-2.3](https://tex.z-dn.net/?f=z%3D-2.3)
Now we will use the normal distribution table to find
.
Since the probability of a student getting grade less than 62.9 is 0.01072, so we will multiply 0.01072 by the 440 to get the number of students, who must attend summer school for history.
![\text{Number of students, who must attend summer school for U.S. history}=0.01072\times 440](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20students%2C%20who%20must%20attend%20summer%20school%20for%20U.S.%20history%7D%3D0.01072%5Ctimes%20440)
Therefore, 5 students must attend summer school for U.S. history.
Answer:
65
Step-by-step explanation:
(-6.5)(-5) = +32.5, and then
(32.5)(2) = 65 (answer)
Answer:
I cant help because its rly blurry but I think the answer is 120¿