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.
This can be solved by using the binomial distribution, as follows: [tex]P(3\ out\ of\ 5)=5C3\times(0.85)^{3}\times(0.15)^{2}=0.1382[/tex] The answer is: 0.1382 to 4 decimal places.
