Question 1158323: Tina works on 5 projects. The probability of completing a project on schedule is 3/7. What is the probability that she will complete at least 3 projects on schedule? how to solve and what is the answer
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! Binomial problem
this is 3,4,5
5C3 or 10 ways to do 3
10*(3/7)^3(4/7)^2*5(3/7)^4*(4/7)*(3/7)^5, The coefficient is 5C3,5C4, and 5C5.
calculator using 1-binomcdf and do 5 (3/7) and 2. This gives 0.3678. The calculator does the function from the left, and we want the 3 cases to the right, so we subtract from 1 at the beginning to get the complement
check using binomial pdf for 3, 4, 5
The arguments are 5,(3/7),and each of those numbers.
|
|
|
