Approximately 75% of all marketing personnel are extroverts, whereas about 60% of all computer programmers are introverts.

Question:

Approximately 75% of all marketing personnel are extroverts, whereas about 60% of all computer programmers are introverts.
(a) At a meeting of 15 marketing personnel, what is the probability that 10 or more are extroverts? What is the probability that 5 or more are extroverts? What is the probability that all are extroverts?
(b) In a group of 5 computer programmers, what is the probability that none are introverts? What is the probability that 3 or more are introverts? What is the probability that all are introverts?
The binomial will be used. Answers may vary slightly depending on whether the binomial formula, the binomial table, or results from a calculator or computer are used. Please answer the following questions and then complete the problem: What makes up a trial? What is a success? What is a failure? What are the values of n, p, and q?
Distribution
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