Question 478035
a student takes a pop quiz that consists of three true-false questions. Each question can be answered correctly (c) and incorrectly (I). 
Consider this a three step process, i.e., answering the first question with a C or an I, answering the second question with a C or an I, and answering the third with a C or an I.
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Identify each sample space outcome using the c and i designations. 
Sample space:
ccc
cci
cic
icc
cii
ici
iic
iii
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What is the probability that the student gets all three questions correct? 
Ans: 1/8
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What is the probability that the student gets exactly two questions correct?
Ans: 3/8
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What is the probability that the student gets at least two questions correct?
Ans: 4/8 = 1/2
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Cheers,
Stan H.
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