Question

11.) Giving a test to a group of students, the grades and gender are summarized below. Round your answers to 4 decimal places.

Grades and Gender

	A	B	C	Total
Male	18	6	5	29
Female	9	14	2	25
Total	27	20	7	54

If one student is chosen at random,

a. Find the probability that the student got a C:

b. Find the probability that the student was male AND got a "B":

c. Find the probability that the student was male OR got an "A":

d. If one student is chosen at random, find the probability that the student was male GIVEN they got an 'A':

12.) CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below.

	better	same	worse
Republican	38	104	44
Democrat	12	87	137
none	21	90	118

If we randomly select one of the adults who participated in this study, compute: (round to four decimal places)

a.P(Republican) =

b.P(same) =

c.P(same|Republican) =

d.P(Republican|same) =

e.P(Republican and same)

Answer 1

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