d) What is the expected number of AAI members having the shares?

MATLAB: An Introduction with Applications
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Please answer question d.

2. An American Association of Individual Investors survey found that 25%of AAI members
had purchased shares of stock directly through an initial public offering (IPO). In a sample of 4
A-Ư members,
a) What is the probability exactly three members have purchased IPOS?
b) What is the probability at least 2 members have purchased IPOS?
c) What is the probability that none of them have purchased IPOS?
d) What is the expected number of AAI members having the shares?
What is its variance (use approximate formula?
Transcribed Image Text:2. An American Association of Individual Investors survey found that 25%of AAI members had purchased shares of stock directly through an initial public offering (IPO). In a sample of 4 A-Ư members, a) What is the probability exactly three members have purchased IPOS? b) What is the probability at least 2 members have purchased IPOS? c) What is the probability that none of them have purchased IPOS? d) What is the expected number of AAI members having the shares? What is its variance (use approximate formula?
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