Question

The table summarizes results from pedestrian deaths that were caused by automobile accidents.

Pedestrian Deaths

Driver Intoxicated?	Pedestrian Intoxicated?
	Yes	No
Yes	55	77
No	233	611

If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated. (Round your answer to 4 decimal places.)
Probability =

B.

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	16	17	13	46
Female	11	20	19	50
Total	27	37	32	96

If one student is chosen at random,

a. Find the probability that the student got an A:  

b. Find the probability that the student was male AND got an "A":  

c. Find the probability that the student was female OR got a "C":  

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

Answer 1

Pedestrian Deaths

Driver Intoxicated?	Pedestrian Intoxicated?
	Yes	No
Yes	55	77
No	233	611

the probability that the pedestrian was intoxicated. =  

the probability that the pedestrian was intoxicated. = 0.2951

ans 2 )

Grades and Gender

	A	B	C	Total
Male	16	17	13	46
Female	11	20	19	50
Total	27	37	32	96

a. the probability that the student got an A = 27/96 =0.2813

b the probability that the student was male AND got an "A" = 16/ 46 =0.3478

c. There are 46 males total and 32 people who got a C  So there are 46+32 = 78 people who either are male or got a B

We need to subtract off the 13 males who got C . i.e 78 -13 = 65 now there are 96 student total

P(male OR got a C) = (number who are male or got a C or both)/(total no. of students )
P(male OR got a C) = 65/96
P(male OR got a C) = 0.6771

d)  one student is chosen at random, the probability that the student got an 'B' GIVEN they are male = 16 / 27 =0.5926