A student who has not studied takes a quiz consisting of 10true-or.pdf

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A student who has not studied takes a quiz consisting of 10 true-or-false questions. If the student makes a random guess for each question, what is his probability of answering at least 8 questions correctly? Solution P = c(8,10) x 0.5^8x 0.5^7 x 0.5^6 x 0.5^5 x 0.5^4 x 0.5^3 x 0.5^2 x 0.5^1 x 1 = 0.055.

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P = c(8,10) x 0.5^8x 0.5^7 x 0.5^6 x 0.5^5 x 0.5^4 x 0.5^3 x 0.5^2 x 0.5^1 x 1 = 0.055

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