Answer
a.
i. 0.68
ii. 0.811
iii. 0.324
b. 0.75
Work Step by Step
a.
i. P(favor) = P(favor and Republican) + P(favor and Democrat) + P(favor and other)
= 0.3 + 0.22 + 0.16
= 0.68
ii. P(Republican) = P(Republican and favor) + P(Republican and oppose) + P(Republican and no opinion)
= 0.3 + 0.04 + 0.03
= 0.37
P(favor|Republican) = P(Republican and favor)/P(Republican)
= 0.3/0.37
= 0.811
iii. P(Democrat|favor) = P(favor and Democrat)/P(favor)
= 0.22/0.68
= 0.324
b.
P(Republican or favor) = P(Republican) + P(favor) - P(Republican and favor)
= 0.37 + 0.68 - 0.3
= 0.75
