Question 1041052
About 30% of adults in United States have college degree.
(probability that a person has college degree is p = 0.30).

If N = 10 adults are randomly selected, find probabilities that

1) exactly X = 3 out of selected N = 10 adults have college degree
P(X=3) = 10C3*0.3^3*0.7^7 = binompdf(10,0.3,3) = 0.2668
------------------------------------------------------
2) less than X=3 out of selected N=10 adults have college degree
P(0<= x <=2) = binomcdf(10,0.3,2) = 0.3828
-----------------------------------------
3) greater than X=3 out of selected N=10 adults have college degree
P(4<= X <=10) = 1 - binomcdf(10,0.3,3) = 0.3504
---------------------
Choose your numbers for N and X.
------
Cheers,
Stan H.