Question 228437
Fourteen percent of workers believe they will need less than $250,000 when they retire.You randomly select 10 workers and ask each how much money he or she thinks they will need for retirement .
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It's binomial with n=10 ; p = 0.14

find the probability that the number of workers who say they will need less than $250,000 when they retire is 
a)exactly two
Ans: binompdf(10,0.14,2) = 0.2639..
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b)more than 6
Ans: 1 - binomcdf(10,0.14,6) = 0.00008556...
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c)at most five
Ans: binomcdf(10,0.14,5) = 0.9990..
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Cheers,
Stan H.