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Mathematics 13 Online
OpenStudy (ashleey98):

Please Help!!!! A poll was conducted in states A, B, and C to determine which candidate voters would most likely vote for. The results are displayed in the table below: State A State B State C Total Liberal 17 20 12 49 Conservative 23 15 13 51 Total 40 35 25 100 What is P(conservative | State B)?

jimthompson5910 (jim_thompson5910):

Focus on the "state B" column only. What is the value in the bottom of this column?

OpenStudy (ashleey98):

35..

jimthompson5910 (jim_thompson5910):

how many in column B are conservative?

OpenStudy (ashleey98):

Shouldn't it be 15..

jimthompson5910 (jim_thompson5910):

now you divide those two values 15/35 = 3/7

jimthompson5910 (jim_thompson5910):

so the probability of picking a conservative person, given they're from state B, is 3/7

OpenStudy (ashleey98):

Thanks! It wants it in decimal form and rounded, which would be .43

jimthompson5910 (jim_thompson5910):

0.42857 which rounds to 0.43, correct

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