View Full Version : Prob. 6 of 8 in random sample of 60% female pop. is male

04-04-2008, 01:05 AM
Could someone please help me with this problems? I would greatly appreciate it!

1. The student body of a large university consists of 60% female students. A random sample of 8 students are selected. What is the probability that among the students in the sample at least 6 are male?

2. Forty percent of all registered voters in a national election are female. A random sample of 5 voters is selected. The probability that there are no females in the sample is?

3. The probability that Pete will catch fish when he goes fishing is .8 Pete is going to fish 3 days next week. Define the random variable X to be the number of days Pete catches fish. The probability that Pete will catch fish on one day or less is?

04-04-2008, 09:02 AM
What are your thoughts on each? What have you tried? How far have you gotten? Where are you stuck?

Please be complete, so the tutors can "see" where you're having trouble. Thank you! :D