Originally Posted by

**Terpsichore** I left school in the '60s, and I've forgotten most of the statistics I ever knew, so I expect this question is easily answered.

You have one of those spinning discs that has a red, a green and a blue sector (thus producing white). If you throw a dart at it, you have a 1 in 3 chance of hitting red, so over a large number of throws, say 9000, you can expect to score 3000 hits on red. But suppose you divide them into 1000 groups of 9 consecutive throws, and score each session - 3/9, 2/9, 5/9, etc. Two questions:

1. If 3/9 is your average score, does that mean it is also your most common score?

2. Will 2/9 and 4/9 occur with equal frequency?