SOLUTION: In Statistics, past data shows only 10% of students get a failing grade. If there are 10 students are in the course, what is the probability at most 1 will fail? In Statistics,

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Question 242383: In Statistics, past data shows only 10% of students get a failing grade. If there are 10 students are in the course, what is the probability at most 1 will fail?
In Statistics, past data shows only 10% of students get a failing grade. If there are 10 students are in the course, what is the probability more than 1 will fail?
In Statistics, past data shows only 10% of students get a failing grade. If there are 10 students are in the course, what is the mean number of students who will fail?
A multiple-choice examination has 15 questions. Each question has 4 possible answers of which only 1 is correct. If you just guess the whole test, what is the probability of getting exactly 7 correct ?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Let f = failing grade & p = passing grade
p^10+10p^9f
.9^10+10*.9^9*.1
=.7361 Prob that at most 1 will fail.
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Ed