What is the probability of finding a Droite supporter among voters who earn 15 thousand dollars a year?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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The population of voters in a hypothetical country was divided into income groups and also
according to the presidential candidate they supported: a left-wing candidate, Gauche, and a right-
wing candidate, Droite. Suppose the following table provides the joint probability distribution of
income and candidate supported:
Distribution of Income and Candidate
15
Income (X) Gauche Droite
(thousands
(Y=0) (Y=1)
of dollars)
40
75
150
Joint Probability
250
Sum
Candidate (Y)
0.20
0.09
0.14
0.09
0.02
0.54
0.09
0.07
0.15
A
0.04
B
Sum
0.29
с
0.29
0.20
0.06
1
What is the probability of finding a Droite supporter among voters who earn 15 thousand dollars a
year?
Round your answer to two decimal places. Note: if your answer for the probability is, for example,
25.32%, enter 0.25 (NOT 25.32).
Transcribed Image Text:The population of voters in a hypothetical country was divided into income groups and also according to the presidential candidate they supported: a left-wing candidate, Gauche, and a right- wing candidate, Droite. Suppose the following table provides the joint probability distribution of income and candidate supported: Distribution of Income and Candidate 15 Income (X) Gauche Droite (thousands (Y=0) (Y=1) of dollars) 40 75 150 Joint Probability 250 Sum Candidate (Y) 0.20 0.09 0.14 0.09 0.02 0.54 0.09 0.07 0.15 A 0.04 B Sum 0.29 с 0.29 0.20 0.06 1 What is the probability of finding a Droite supporter among voters who earn 15 thousand dollars a year? Round your answer to two decimal places. Note: if your answer for the probability is, for example, 25.32%, enter 0.25 (NOT 25.32).
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