The Brain Teaser: Scroll Down for your Solution
Brain Teaser #102
What Is It?
1. There are four colored balls in a hat: two red, one black and one blue. After pulling out two of them, you know that one of them is red, but you do not know which one. What is the probability that both balls are red?
2. While walking across a bridge I saw a boat full of people. Yet on the boat there wasn't a single person. Why?
1. 1 in 5. The only possible combinations are:
 red1, black
 red1, blue
 red1, red2
 red2, black
 red2, blue
 black, blue
2. Everyone on the boat was married.