SOLUTION: Suppose that the probability of a student passing a course is 0.20. What is the probability that 29 out of 44 students passed the course? Since I am looking at a nominal variabl

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose that the probability of a student passing a course is 0.20. What is the probability that 29 out of 44 students passed the course? Since I am looking at a nominal variabl      Log On


   

Question 1071248: Suppose that the probability of a student passing a course is 0.20. What is the probability that 29 out of 44 students passed the course?
Since I am looking at a nominal variable (pass or fail) I tried setting it up like a coin toss experiment, but that doesn't seem to work. I am not sure what the formula is that I need to use.
Thank you very much!
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Not sure why that didn't work,
P%28X%29=C%2844%2CX%29%2A%280.2%29%5EX%2A%280.8%29%5E%2844-X%29
P%2829%29=C%2844%2C29%29%2A%280.2%29%5E29%2A%280.8%29%5E15
P%2829%29=%282.299x10%5E%2811%29%29%285.3687x10%5E%28-21%29%29%280.035184%29
P%2829%29=4.34x10%5E%28-11%29