SOLUTION: 24. Suppose that a statistics class is being given an 8 question multiple choice quiz; there are 4 choices for each question with only 1 correct answer. If I. M. Lucky guesses on

Question 870416: 24. Suppose that a statistics class is being given an 8 question multiple choice quiz; there are 4 choices for each question with only
1 correct answer. If I. M. Lucky guesses on each question, what is the probability that he gets at most 4 questions correct?
(A) 0.03 (B) 0.09 (C) 0.97 (D) 0.50 (E) 0.11
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p(correct) = .25, n = 8
P(x ≤ 4 correct) = binomcdf(8, .25 , 4) = .9727 0r 97.27% chance
Above shows the Use of the TI Caclulator
One may use on-line calculators: recommend stattrek.com
0r one can obtain answer 'by hand'

P(x ≤ 4 correct) = P(x=0) + P(x=1) + P(x=2) + P(x=3) + P(x = 4)
P(x=0) =
P(x=1) =
P(x=2) =
P(x=3) =
P(x=4) =
for cumulative Probabilities, recommend Calculator
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