Question 872074: A survey indicates 40% of households in the USA own CD players from a random sample of 250 households in the USA find the probability that the number of households who own CD players is:
a) exactly 95
b) between 105 and 110
c) at most 85
d) at least 95
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website! p = .40, n = 250
P(x = 95) = binompdf(250, .40, 95) = .0421 0r 4.21%
P(105 ≤ x ≤ 110) = binomcdf(250, .40, 110)- binomcdf(250, .40, 104) = .9119 - .7203 = .1916 0r 19.16%
P(x ≤ ≤ 85) = binomcdf(250, .40, 85) = .0297 0r 2.97%
P(x ≥ 95) = 1 - (1-binomcdf(250, .40, 94) = .7605 0r 76.05%
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