A certain experiment was performed 150 times with the following outcomes:
Outcome P : 0 times
Outcome Q : 45 times
Outcome R : 105 times
Which of the following statements is correct?
a) The probability of outcome Q is 31.
b) Outcome P is impossible and its probability is 0.
c) Outcome Q is certain and its probability is 1.
d) The total probability of outcomes P and Q exceeds 1.