Computer Ownership At a local university 54.3% of incoming first-year students have

Chapter 4, Problem 7

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QUESTION:

Computer Ownership At a local university 54.3% of incoming first-year students have computers. If 3 students are selected at random, find the following probabilities. a. None have computers. b. At least one has a computer. c. All have computers.

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QUESTION:

Computer Ownership At a local university 54.3% of incoming first-year students have computers. If 3 students are selected at random, find the following probabilities. a. None have computers. b. At least one has a computer. c. All have computers.

ANSWER:

Step 1 of 4

Given Information:

Probability that a first year student have a computer is 0.543(p).

Number of students selected is 3 (n).

Let X be the random variable for the count of students in 3 who have computer.

Assuming,

Each student is independent.

Each student has same probability of having a computer.

X would follow normal distribution such that,

                                                             

 

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