Mathematics, 19.02.2020 01:38 Nov25
Richard has just been given a 4-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all four questions, find the indicated probabilities. (Round your answers to three decimal places.) (a) What is the probability that he will answer all questions correctly?
(b) What is the probability that he will answer all questions incorrectly?
(c) What is the probability that he will answer at least one of the questions correctly? Compute this probability two ways. First, use the rule for mutually exclusive events and the probabilities shown in the binomial probability distribution table.
Then use the fact that P(r ? 1) = 1 ? P(r = 0).
Compare the two results. Should they be equal? Are they equal? If not, how do you account for the difference?
They should be equal, but may differ slightly due to rounding error. They should not be equal, but are equal. They should be equal, but differ substantially. They should be equal, but may not be due to table error.
(d) What is the probability that Richard will answer at least half the questions correctly?
Answers: 1
Mathematics, 20.06.2019 18:02
Use continuity to evaluate the limit. lim x→16 20 + x 20 + x step 1 consider the intervals for which the numerator and the denominator are continuous. the numerator 20 + x is continuous on the interval the denominator 20 + x is continuous and nonzero on the interval
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Mathematics, 22.06.2019 00:30
Will mark ! (10 points also! ) if x varies inversely with y and x =6 when equals y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15
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Richard has just been given a 4-question multiple-choice quiz in his history class. Each question ha...
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