SOLUTION: A multiple choice test given with 100 questions and 5 answers per question. What is the probability of getting 60% or higher if the another was guessed? How do you calculate P(x&#
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Question 1044276: A multiple choice test given with 100 questions and 5 answers per question. What is the probability of getting 60% or higher if the another was guessed? How do you calculate P(x≥60)?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
Use the binary probability formula
:
if the answer is guessed, then
:
p = 0.20, q = 0.80, n = 100
:
You sum the probabilities for r = 0 to 59 and subtract the total from 1
:
P(X > or = 60) < 0.000001
:
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