SOLUTION: At a local University, it is reported that 81% of students own a wireless device. If 3 students are selected at random, what is the probability that none of the three have a wirele

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Question 1098443: At a local University, it is reported that 81% of students own a wireless device. If 3 students are selected at random, what is the probability that none of the three have a wireless device?

a. 0.007

b. 0.002

c. 0.129

d. 0.005
Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.
1 - 0.81 = 0.19  is the fraction of those students who HAS NONE of the three devices.


Then the probability under the question is   {{0.19^3}}} = 0.006859.


Option a):  0.007.