SOLUTION: According to a recent report, 0.28 is the probability that an American adult male has high cholesterol requiring treatment. Seven American adult males are randomly selected. Find t

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Question 872333: According to a recent report, 0.28 is the probability that an American adult male has high cholesterol requiring treatment. Seven American adult males are randomly selected. Find the probability that exactly 2 of the 7 American adult males have high cholesterol requiring treatment. Would you please show the solution? Thank you!!!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
This is a binomial distribution problem

(n C k)*(p)^(k)*(1-p)^(n-k) ... n C k is found through the combination formula (n!)/(k!*(n-k)!)

(7 C 2)*(0.28)^(2)*(1-0.28)^(7-2)

21*(0.28)^(2)*(1-0.28)^(7-2)

21*(0.28)^(2)*(0.72)^5

21*0.0784*0.1934917632

0.31856483893249


Final Answer: 0.31856483893249 (this is approximate, round appropriately if needed)