- #1
th3whit3fang
- 8
- 0
Homework Statement
You have got 10 multiple choice questions with 3 possible choices per question. What is ur chance that you will have 5 answers correct?
So the chance for a correct answer per question is 1/3 and for an uncorrect answer per question is 2/3.
The Attempt at a Solution
correct solution:
10 nCr 5 * (1/3)^5 * (2/3)^5 = 896/6561
(with 10 nCr 5 = combination with n= 10 and k = 5 )
I don't know how to get to the solution.
THank u