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OpenStudy (rea201):
Can someone help me with honors pre-calc A student guesses the answers to all 10 questions on a true/false test. What is the probability that the student gets 6 questions correct?
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OpenStudy (anonymous):
use binomial approximation
OpenStudy (phi):
See http://en.wikipedia.org/wiki/Binomial_distribution#Probability_mass_function the formula is \[ Prob(6) = 10C6 0.5^6 0.5^4
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