SOLUTION: When an adult is randomly selected, there is an 85% chance that this person knows what Twitter is. Find the probability that exactly three out of any five randomly selected adults

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Question 1107243: When an adult is randomly selected, there is an 85% chance that this person knows what Twitter is. Find the probability that exactly three out of any five randomly selected adults know of Twitter.
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


Binomial probability; 0.85 probability that the person knows and 0.15 probability that they don't.

The probability that 3 out of 5 know and 2 do not is

C%285%2C3%29%2A%280.85%29%5E3%2A%280.15%29%5E2+=+0.138178125