Step 1: Recall the limitations of probability

            NOTE: From the definition of probability P(E), we see that the numerator (number of outcomes favourable to the event E) is

            always less than or equal to the denominator (the number of all possible outcomes).

                    Therefore, 0 ≤ P(E) ≤ 1.   

The probability of an event is greater than or equal to  ZERO and less than or equal to (ONE) 1