MA215 W2A

Week 2 Assignment
Question 1

Compute the mean and the weighted mean for the following data.  Show your work.

Weight
Grade Earned
Midterm
10%
63
Discussion
30%
100
Assignment
20%
75
Project
20%
80
Quizzes
20%
90
If the professor asked you if you would like the mean grade or the weighted mean grade, which would you choose? Why?  What weighted category made the greatest impact?

Question 2 – Work is required.

If P(A) = 0.45, P(B) = 0.49, and P(A ∪ B) = 0.85, then P(B | A) =

Question 3 – You must show the fractions that you multiplied together. If you do not use that method, you must show your work for your other method.

Seven vitamin and five sugar tablets identical in appearance are in a box. One tablet is taken at random and given to Person A. A tablet is then selected and given to Person B. What is the probability that

Person A was given a vitamin tablet?
Person B was given a sugar tablet given that Person A was given a vitamin tablet?
neither was given vitamin tablets?
both were given vitamin tablets?
Person A was given a sugar tablet and Person B was given a vitamin tablet?
Person A was given a vitamin tablet and Person B was given a sugar tablet?
exactly one person was given a vitamin tablet?