A university conducted a survey of 278278 Sophomore Junior a

A university conducted a survey of

278278

Sophomore, Junior, and Senior undergraduate students regarding satisfaction with student government. Results of the survey are shown in the table by class rank.

Sophomore

Junior

Senior

Total

Satisfied

5252

6868

6060

180180

Neutral

1616

1616

99

4141

Not satisfied

1818

1515

2424

5757

Total

8686

9999

9393

278278

A survey participant is selected at random. What is the probability that he or she is a

SeniorSenior

or

satisfiedsatisfied?

The probability that a randomly chosen participant is a

SeniorSenior

or

satisfiedsatisfied

is

nothing.

(Round to three decimal places as needed.)

Solution

Probability that he or she is a senior that satisfied=(6060/9323)+((99/9323)/2)=0.65+0.005=0.6555.