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Chapter 3: Q. 105 (page 227)

Use the information in the Table 3.19to answer the next eight exercises. The table shows the political party affiliation of each of 67members of the US Senate In June 2012. and when they are up reelection.

Suppose that a member of the US Senate is randomly selected. Given that the randomly selected senator is up for reelection In November 2016, what is the probability that this senator is a Democrat?

Short Answer

Expert verified

The probability of the reelection in November2016the senate of democratic party is13.

Step by step solution

01

Given information

Number of persons in democratic party year of 2014is 20.

Number of persons in democratic party year of2016is10.

02

Calculation for probability

Randomly selected member of US Senate is Democrat.

In November 2016,

Number of person in democratic party is localid="1649668748251" 10.

Probability=NoofpersonsTotalnoofpersons

Total no of persons in democratic party is equal to sum of persons in November 2014and2016.

So,

Total no of persons=20+10

=30

Thus,

P(Democraticparty)=1030

=13

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