SOLUTION: A test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. what i
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Question 1194901: A test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. what is the probability of getting atleast 7 questions correct on this test. Answer by Solver92311(821) (Show Source):
The probability of getting a correct answer to any single question is one in five or 0.20. Each question is an independent trial. Since the probability is constant for a number of independent trials, use the binomial distribution:
The probability of at least successes in trials is given by:
Plug in the numbers and do the arithmetic. You should get an answer that is smaller than 0.0009.
John
My calculator said it, I believe it, that settles it
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