Question 359637: According to the college registrar's office, 60% of students enrolled in an introductory statistics class this semester are freshmen, 25% are sophomores, 10% are juniors, and 5% are seniors. You want to determine the probability that, in a random sample of five students enrolled in introductory statistics this semester, exactly two are freshmen.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! According to the college registrar's office, 60% of students enrolled in an introductory statistics class this semester are freshmen, 25% are sophomores, 10% are juniors, and 5% are seniors. You want to determine the probability that, in a random sample of five students enrolled in introductory statistics this semester, exactly two are freshmen.
---
Binomial problem with n = 5 and p = 0.6
---
P(x=2) = 5C2*0.6^2*0.4^3 = 0.2304
-------------------------
Cheers,
Stan H.
-------
|
|
|
