A box contains 1000 bulbs, of which 2 are black and the rest are white.

- Which of the following is mostlikely to occur in 1000 draws with replacement from the box ? Fewer than 2 black balls, Exactly two black balls, more than two black balls.
- If two series of 1000 draws are made at random from the box, what is, approximately, is the chance that they produce the same number of black balls ?