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A test consists of 10 true/false questions. To pass the test a student must answer at least 8 questions correctly. a. If a student guesses on each question, what is the probability that the student will answer 4 questions correctly? Round your answer to the nearest hundredth. b. If a student guesses on each question, what is the probability that the student will pass the test? Round your answer to the nearest hundredth. c. Find the expected number of correct answers for a student? Round your answer to the nearest hundredth.

A test consists of 10 true/false questions. To pass the test a student must answer at least 8 questions correctly. a. If a student guesses on each question, what is the probability that the student will answer 4 questions correctly? Round your answer to the nearest hundredth. b. If a student guesses on each question, what is the probability that the student will pass the test? Round your answer to the nearest hundredth. c. Find the expected number of correct answers for a student? Round your answer to the nearest hundredth.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.7: Probability And Odds
Problem 14E
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F1 2 A test consists of 10 true/false questions. To pass the test a student must answer at least 8 questions correctly. W S a. If a student guesses on each question, what is the probability that the student will answer 4 questions correctly? Round your answer to the nearest hundredth. b. If a student guesses on each question, what is the probability that the student will pass the test? Round your answer to the nearest hundredth. c. Find the expected number of correct answers for a student? Round your answer to the nearest hundredth. d. Find the standard deviation of the number of correct answers. Round your answer to the nearest hundredth. e. Is it unusual for a student to pass by guessing? Explain. F2 > Next Question # 3 20 E D F3 सी पं 4 388 F4 R LL F % 5 F5 T MacBook Air 6 G F6 Y & 7 H F7 U 00 * 8 F8 J F9 K
Transcribed Image Text:F1 2 A test consists of 10 true/false questions. To pass the test a student must answer at least 8 questions correctly. W S a. If a student guesses on each question, what is the probability that the student will answer 4 questions correctly? Round your answer to the nearest hundredth. b. If a student guesses on each question, what is the probability that the student will pass the test? Round your answer to the nearest hundredth. c. Find the expected number of correct answers for a student? Round your answer to the nearest hundredth. d. Find the standard deviation of the number of correct answers. Round your answer to the nearest hundredth. e. Is it unusual for a student to pass by guessing? Explain. F2 > Next Question # 3 20 E D F3 सी पं 4 388 F4 R LL F % 5 F5 T MacBook Air 6 G F6 Y & 7 H F7 U 00 * 8 F8 J F9 K
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