Question 688175: According to the most recent University student profile, 28% of students are male. Given a sample of 15 students:
a. Find the probability that none are male.
b. Find the probability that 10 are male.
c. Find the probability that at least six are male.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! According to the most recent University student profile, 28% of students are male. Given a sample of 15 students:
a. Find the probability that none are male.
Ans: P(x = 0) = (0.72)^15
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b. Find the probability that 10 are male.
Ans: P(x = 10) = 15C10*(0.28)^10*(0.72)^5
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c. Find the probability that at least six are male.
P(6<= x <= 15) = 1 - P(0<= x <=5) = 1 - binomcdf(15,0.28,5) = 0.2220
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Cheers,
Stan H.
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