On a six-question multiple-choice test there are five possible answers for each question, of which one is correct and four are i
1 answer:
Answer:
Step-by-step explanation:
given that on a six-question multiple-choice test there are five possible answers for each question, of which one is correct and four are incorrect
By mere guessing probability for choosing correct answer = p = 0.2
also each question is independent of the other
Hence if X is the number of correct questions then
X is binomial with p = 0.2 and n = 6
a) being correct on three questions,
=
(b) being correct on four questions,
=
(c) being correct on all six questions
=
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Step-by-step explanation:
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0.0498 = 4.98%
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:
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x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given time interval.
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Each minute has 60 seconds.
So a rate of 1 inquire each 4 seconds.
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