The mean of the scores obtained by a class of students on a physics test is 42. the standard deviation is 8%. students have to score at least 50 to pass the test.

assuming that the data is normally distributed, %) of the students passed the test.

% of students passed ?
choices: 5 16 34 58

B. 16%.

Step-by-step explanation:

We have been given that the The mean of the scores obtained by a class of students on a physics test is 42. The standard deviation is 8%. Students have to score at least 50 to pass the test.

First of all, we will find z-score of sample score 50 by using z-score formula.

, where,

,

,

,

.

Upon substituting our given values in z-score formula we will get,

Now, we will use normal distribution table to find the area above the z-score of 1.

Using normal distribution table we will get,

Now we will multiply our answer by 100 to convert it into percentage.

Therefore, approximately 16% of the students passed the test and option B is the correct choice.

true

explanation:

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base