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According to Harper's Index, 55% of all federal inmates are serving time for drug dealing

1. 

According to Harper's Index, 55% of all federal inmates are serving time for drug dealing. A random sample of 16 federal inmates is selected 

(a) What is the probability that 11 or more are serving time for drug dealing? (Round your answer to three decimal places.) 

(b) What is the probability that 4 or fewer are serving time for drug dealing? (Round your answer to three decimal places.) 

(c) What is the expected number of inmates serving time for drug dealing? (Round your answer to one decimal place.)


2.

Consumer Reports rated airlines and found that 80% of the flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time) arrival rate is representative of the entire commercial airline industry, consider a random sample of 196 flights. 

What is the expected number that will arrive on time? 

What is the standard deviation of this distribution?

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