A box contains 1000 balls, of which 2 are black and the rest are white.
a) Which of the following is most likely to occur in 1000 draws with replacement from the box? Fewer than 2 black balls, exactly 2 black balls, more than 2 black balls
b) If two series of 1000 draws are made at random from this box, what, approximately, is the chance that they produce the same number of black balls?