Question 503814: A test consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. TO pass the test a student must get 60% or better on the test. If a student randomly guesses, what is the probability the student will pass the test?
how would i solve this? i know that n=10 abd p is either= .05 (5/100) or .05X.5=.025 i times the .05 but .5 because the student ramdomly guess which is 50%
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A test consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. TO pass the test a student must get 60% or better on the test. If a student randomly guesses, what is the probability the student will pass the test?
how would i solve this? i know that n=10 abd p is either= .05 (5/100) or .05X.5=.025 i times the .05 but .5 because the student ramdomly guess which is 50%
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Binomial Problem with n = 10 and p = 1/5
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60% of 10 is 6
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Solve using a TI-84 calculator:
P(6<= x <=10)
= 1-P(0<= x <=5)
= 1-binomcdf(10,1/5,5)
= 0.0064
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Cheers,
Stan H.
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