1. ## Ball-bags

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

2. Originally Posted by Obsidantion
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
I don't know, but I suggest you take a trip to your Doctor. It could be serious.

3. Originally Posted by Mush
I don't know, but I suggest you take a trip to your Doctor. It could be serious.

4. Originally Posted by Obsidantion
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
I will assume you're not color blind.

Calculate the probability that your bag looks like each of the following:

O O O

O O O

O O O

Then calculate the probability of getting a O from each of those bags.

For each bag calculate (probability of bag)(probability of O from that bag). Add the results.