Suppose approximately 75% of all marketing personnel are extroverts, whereas about 50% of all computer programmers are introverts. (For each answer, enter a number. Round your answers to three decimal...

(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 4 computer programmers, what is the probability that none are introverts?



What is the probability that 2 or more are introverts?



What is the probability that all are introverts?