Question 385027: suppose you have a 9 questions multiple choice test with 3 possible answers. also suppose you guess on each question. what would the probability of 0, 1, 2, 3,4,5,6,7,8,9, would be?? round four decimals places
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! suppose you have a 9 questions multiple choice test with 3 possible answers. also suppose you guess on each question. what would the probability of 0, 1, 2, 3,4,5,6,7,8,9, would be?? round four decimals places
------------------------------------------
Binomial Problem with n = 9 and p = 1/3
---
If k is any one of those numbers you listed,
P(x = k) = 9Ck*(1/3)^k*(2/3)^(9-k)
=======================================
Example:
P(x = 3) = 9C3*(1/3)^3*(2/3)^6 = 0.2731
====================
cheers,
Stan H.
|
|
|
