Knock Knock.
Who’s there?
Doctor E.
Doctor E. Who?
Doctor E., who has a contest that is open to any UNI student or high-school student. There will be a cash prize of $60 for the first place team or individual, with prizes of $40 and $20 going to the runners up. Additional prizes will be supplied by Kadon Enterprises, makers of fine gamepuzzles since 1980. There will be handsome certificates, suitable for framing, for all who wind up with outstanding scores. That is who.

Turning in the correct solution to this week’s puzzle by 4/14 will earn 2 puzzle-points. Turning in the correct solution along with the name of the first United States president who received a Nobel Peace Prize earns 3 puzzle-points.

I have two children.

1. If one of them is a girl, what is the probability that the other one is a girl?
2. If one of them is a girl, what is the probability that the oldest is a girl?
3. If the oldest one is a girl, what is the probability that the other one is a girl?

The deadline for sending in solutions has expired.  But feel free to take some time to work on this one, and click here to see the answer.   Alternatively, click here to see the current challenge.

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