SOLUTION: In a sample of 2016 U.S. adults, 242 said Richard Nixon was the worst president since World War II. Three U.S. adults are selected at random without replacement. (a) Find the pro

Question 1047544: In a sample of 2016 U.S. adults, 242 said Richard Nixon was the worst president since World War II. Three U.S. adults are selected at random without replacement.
(a) Find the probability that all three adults say Richard Nixon was the worst president since World War II.
(b) Find the probability that none of the three adults say Richard Nixon was the worst president since World War II.
(c) Find the probability that at most two of the three adults say Richard Nixon was the worst president since World War II.
(d) Which of the events can be considered unusual? Explain.

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p(nixon) = 242/2016 = .12, n = 3
TI syntax for P(x-value) is binompdf(n, p, x-value).
a)P(x = 3) = (3, .12, 3)
b)P( x = 0) = (3, .12, 0)
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c) P(x <=2)
I syntax is binomcdf(n, p, largest x-value) for binomial ≤ cumulative probability
P(x <=2) = binomcdf(3, .12, 2)
d) One with smallest probability
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