You may need to use the appropriate appendix table or technology to answer this question. In a large university, 45% of the students are female. (a) If a random sample of twenty students is selected, what is the probability that the sample contains exactly four female students? (Round your answer to four decimal places.)   (b) If a random sample of twenty students is selected, what is the probability that the sample will contain exactly 15 female students? (Round your answer to four decimal places.)   (c) If a random sample of twenty students is selected, what is the probability that the sample will contain exactly twenty female students? (Round your answer to four decimal places.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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You may need to use the appropriate appendix table or technology to answer this question.
In a large university, 45% of the students are female.
(a)
If a random sample of twenty students is selected, what is the probability that the sample contains exactly four female students? (Round your answer to four decimal places.)
 
(b)
If a random sample of twenty students is selected, what is the probability that the sample will contain exactly 15 female students? (Round your answer to four decimal places.)
 
(c)
If a random sample of twenty students is selected, what is the probability that the sample will contain exactly twenty female students? (Round your answer to four decimal places.)
 
(d)
If a random sample of twenty students is selected, what is the probability that the sample will contain more than nine female students? (Round your answer to four decimal places.)
 
(e)
If a random sample of twenty students is selected, what is the probability that the sample will contain fewer than five female students? (Round your answer to four decimal places.)
 
(f)
If a random sample of twenty students is selected, what is the expected number of female students?
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