The following is the roster for a small upper-division biology class at a univer

Question

The following is the roster for a small upper-division biology class at a university. The course is offered to both biology and non-biology majors. Each row represents the major, class standing, and course grade. Of the students in the class the chance a randomly selected student is: Round all probabilities to three decimal places. a Biology major is: P(Biology Major) = a senior is: P(Senior) = a Biology major AND a Senior is: P(Biology AND Senior) is: = Explain step by step as if you giving a solution to someone who does not know anything about probability how you came up with your answer for part c.

Explanation / Answer

a. There are total 18 students and 11 of them are Biology major. Therefore:

P(Biology) = 11/18 = 0.611

b. There are total 18 students and 7 of them are Senior. Therefore:

P(Senior) = 7/18 = 0.389

c. There are total 18 students and 3 of them are Biology and Senior. Therefore:

P(Biology and Senior) = 3/18 = 0.167

d. There is 61.1% chance that a student enroll in Biology major. There is 38.9% students are senior and 16.7% students are senior and took Biology as major.

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