Number of freshmen = 14
Number of sophomores = 21
Number of juniors = 9
Number of seniors = 1
Let E denote the event of the Professor selecting the senior to answer a question and S denote the sample space. Then, P(E) denotes the probability that E occurs. The probability is given by,
Where, n(E) denotes the number of elements in E and n(S) denotes the number of elements in S.
Calculate the total number of students enrolled in the college algebra class.
Total number of students enrolled in the college algebra class = 14+21+9+1=45
The probability that the Professor randomly selects the senior to answer a question is given by,
=Number of seniors in class/Total number of students in class
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