I have two children, at least one of them is a girl who was born on a Friday. What is the probability that they are both girls?

Assume that each child is equally likely and independently to be a boy or girl.

Now let the battle commence.

I know this is well known and almost certainly has been posted here before, you’ll see why I’m posting it when it comes to part 2.

I have two children, at least one of them is a girl. What is the probability that they are both girls?

As a few of you have brought it up, [...]

1. Ragknot waits on death row for framing some poor guy for car theft… very serious in these here parts. By custom, the night before a man is to be executed, he plays a game- either of chance or skill, it is the judge’s discretion. This game will decide whether the prisoner will indeed die, [...]

The gambling hall has now given me the right to play with my Strange Dice for the first roll. If I roll a 13, I can’t win with the regular dice. Should I try my Strange Dice? Will they give me a better chance to win more or less?

Craps Info————————

The player rolls [...]

The other die of the Strange Dice pair is different.

Half the time you roll a one, it appears as a two. The normal side two always appears as a two. What is the average number of rolls of the die to get each number (1 to 6) at least once?

Just like Chris’s #4 (previous post) but …

you have a strange die. Half the time you roll a six, it apprears as a seven. What is the average number of rolls of a die to have got each number (1 to 7) at least once?Знакомства