In order to get promoted to the next grade, a student is required to score above 55 in the final test. Assume the scores to be normally distributed with a mean of 60 and a standard deviation of 5.5. Calculate the percentage of students who will be promoted to the next grade.

And we can find this probability with the complement rule:

And we can use excel or the normal standard table and we got:

So then we expect about 81.8% of students that will be promoted

Step-by-step explanation:

Let X the random variable that represent the scores of promotion of a population, and for this case we know the distribution for X is given by:

Where and

We want to find the following probability:

And we can use the z score formula given by:

Using the z score formula we got:

And we can find this probability with the complement rule:

And we can use excel or the normal standard table and we got:

So then we expect about 81.8% of students that will be promoted

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

answer: idk wbu

step-by-step explanation: umm..