SOLUTION: A multiple-choice quiz has 200 questions, each with 4 possible answers
of which only 1 is correct. What is the probability that sheer guesswork
yields from 25 to 30 correct answ
Algebra.Com
Question 1163976: A multiple-choice quiz has 200 questions, each with 4 possible answers
of which only 1 is correct. What is the probability that sheer guesswork
yields from 25 to 30 correct answers for the 80 of the 200 problems
about which the student has no knowledge?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
\ =\ \sum_{r=25}^{30}\,{{80}\choose{r}}\(0.25\)^r\(0.75\)^{1-r})
You can do your own arithmetic.
John
My calculator said it, I believe it, that settles it
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