Question A bag contains 4 blue counters and 3 red counters. A box contains 5 blue counters and 2 red counters. Complete the tree diagram and work out the probability of selecting two red counters.

From the tree diagram, the probability of winning the second set = 27 50 + 10 50 = 37 50. This means that in every 50 matches, she may win the second set 37 times (ie 37 becomes the denominator ...