A pollster asked 1000 adults whether Republicans or Democrats have better domest
ID: 3172722 • Letter: A
Question
A pollster asked 1000 adults whether Republicans or Democrats have better domestic economic policies. The following table gives the two-way classification of their opinions.
Sex
Republicans
Democrats
No Opinion
Male
216
324
20
Female
174
216
50
The pollster then randomly selected one adult from these 1000 adults.
Round all to three decimal places and show all work.
a) The probability that the selected adult is a female or thinks that Democrats have better domestic economic policies is:
b) The probability that the selected adult has no opinion or is a male:
c) The probability that the selected adult is a male or doesn't think that Democrats have better domestic economic policies is:
Sex
Republicans
Democrats
No Opinion
Male
216
324
20
Female
174
216
50
Explanation / Answer
A. This is given by (324+174+216+50)/1000 or 0.764
B. This is given by (20+50+216+324)/1000 or 0.610
C. This is given by 1- (216+174+20+50+216)/1000 = 0.676