Question

An appliance dealer sells three different models of freezers having 13.5, 15.9, and 19.1 cubic feet of storage space respectively. Suppose the probabilities of a customer purchase for the models are as follows:


What is the mean size of the freezers purchased by all customers?
A. 1
B. 16.17
C. 16.38
D. 40.5

Answer 1

x 13.5 15.9 19.1

px 0.2 0.5 0.3

Answer 2

wouldnt it be 16.17?

Answer 3

13.5+15.9+19.1=48.5/3

Answer 4

It looks like you'll need to use the given probabilities in the table, for each freezer... looks like expected value... this should give the mean
0.2*13.5 + 0.5*15.9 + 0.3*19.1

Answer 5

oh gotchya!