It is known that 50% of adult workers have a high school...

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It is known that 50% of adult workers have a high school diploma. If a random sample of 8 adult workers is selected, what is the probability that less than 6 of them have a high school diploma? (That is, what is P(X < 6) (round to 4 decimal places)
Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find μ. Round to one decimal place.
20*0.08 If random variable X has a binomial distribution with n =7 and P(success) = p =0.6, find the probability that X is at least 6. (That is, find P(X 6) (round to 4 decimal places)
If random variable X has a binomial distribution with n = 9 and P ( success ) = p = 0 . 4 , find the standard deviation of X . ( round to 4 decimal places )
It was found that 60% of people have a dog as a pet . If a random sample of 11 people is selected , what is the variance of the number of people that have a dog as a pet ? ( That is , what is Var ( X )?) ( round to 2 decimal places )
=11*0.6*0.4

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