A quiz consists of 10 multiple-choice questions with 5 choices for each question. Suppose a student is sure of the first 5 answers and has each of the last 5 questions narrowed to 3 of the possible 5 choices. If the student guesses among the narrowed choices on the last 5 questions, find the probability of getting at least a C (at least 70%). Round your answer to four decimal places.
?
A. Pr(Grade ? C) = 0.0412
B. Pr(Grade ? C) = 0.4200
C. Pr(Grade ? C) = 0.5391
D. Pr(Grade ? C) = 0.4609
E. Pr(Grade ? C) = 0.0163
Answer: C
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Fill in the blank with one of the words or phrases listed below.
The 7 above is called the 
.
A. divisor B. difference C. quotient D. dividend
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A. 
B. 
C. 
D. 