Suppose a multiple choice test contains 40 questions. If each question has 5 answer choices only one of which is correct, what is the expected number of questions to be answered correctly by guessing? The SAT used to penalize wrong answers by subtracting 1/4 a point from each incorrect answer. If each question on the SAT has 5 answer choices only one of which is correct, what is the expected number of points awarded by guessing on 40 questions?
Suppose a multiple choice test contains 40 questions. If each question has 5 answer choices only one of which is correct, what is the expected number of questions to be answered correctly by guessing? The SAT used to penalize wrong answers by subtracting 1/4 a point from each incorrect answer. If each question on the SAT has 5 answer choices only one of which is correct, what is the expected number of points awarded by guessing on 40 questions?
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 6ECP: In Pennsylvania’s Cash 5 game, a player chooses five different numbers from 1 to 43. If these five...
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Transcribed Image Text:Suppose a multiple choice test contains 40 questions. If each question has 5 answer choices only one of which
is correct, what is the expected number of questions to be answered correctly by guessing?
The SAT used to penalize wrong answers by subtracting 1/4 a point from each incorrect answer. If each
question on the SAT has 5 answer choices only one of which is correct, what is the expected number of points
awarded by guessing on 40 questions?
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