Exercises-1: Suppose that a lot of 12 television sets contains 3 defectives. If the TV sets are inspected successively one by one, what is the probability that the last defective is the sixth one examined?
Exercises-2: A box contains 24 identical bulbs, of which 8 are black, 10 are red, and the remaining bulbs are white. Three bulbs are drawn successively from the box at random without replacement. Find the probability that the first bulb is black, the second is red, and the third is white.