Maybe_Memorie
May11-11, 12:27 PM
So suppose we have 3 boxes, A,B,C. Black and Red balls in each.
In A, 3R and 7B.
B, 6R and 4B
C, 8R and 2B
First you take a ball from A. If its R, take one from B. If its B, take one from C.
Given the second is R, what is the prob the first is R?
So I have a tree diagram, but I'm quite unsure about what to do
Also, let's say we have the length of time of telephone calls associated with 2 products.
Mean and standard deviation given.
If you want to find the prob that a random call will take less than 7 minutes, are you supposed to add the mean and SDs together? then proceed as usual?
In A, 3R and 7B.
B, 6R and 4B
C, 8R and 2B
First you take a ball from A. If its R, take one from B. If its B, take one from C.
Given the second is R, what is the prob the first is R?
So I have a tree diagram, but I'm quite unsure about what to do
Also, let's say we have the length of time of telephone calls associated with 2 products.
Mean and standard deviation given.
If you want to find the prob that a random call will take less than 7 minutes, are you supposed to add the mean and SDs together? then proceed as usual?