SOLUTION: In a class of 15 students, the probability of a student passing an exam is 1/4. What is the probability that at least 2 students pass?

Algebra.Com
Question 1116433: In a class of 15 students, the probability of a
student passing an exam is 1/4.
What is the probability that at least 2 students pass?

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
In a class of 15 students, the probability of a
student passing an exam is 1/4.
What is the probability that at least 2 students pass?
----
Binomial Problem with n = 15 and p = 1/4
---
P(x >= 2) = 1-binomcdf(15,1/4,1) = 0.9198
-----
Cheers,
Stan H.
--------------------------------

RELATED QUESTIONS

It has been found that 20% of students who enroll in an introductory statistics class... (answered by Okamiden)
The probability of passing an exam is 0.35. The class has 20 students. What is the... (answered by ewatrrr)
If the overall percentage of success in an exam is 60 , what is the probability that out... (answered by Fombitz)
An experienced teacher writes an exam so that, on average, about 5% of students will earn (answered by VFBundy)
An experienced teacher writes an exam so that, on average, about 5% of students will earn (answered by Edwin McCravy,ikleyn)
In each exam question, a student receives zero, one, or two points with probabilities p0, (answered by ikleyn)
A class of 45 students took an exam. There was 5 A's 11B's 19C's 6D's and the rest... (answered by algebrahouse.com)
If the probability that a student in the statistic class will score grade A in the final... (answered by ewatrrr)
Please solve this question: The ratio of boys to girls in Mr.Peter class is 3:4. On the (answered by stanbon)