Which of the following is an example of theoretical probability?
A. There were 73 people in a grocery store, and 45 of them bought milk. The probability of people buying milk is 45/73.
B. Kenny rolled a number cube 9 times and got 4 even numbers. The probability of an even number is 4/9.
C. Wendy flipped a coin 5 times, and the results were 4 tails. The probability of tails is 4/5.
D. There are 52 playing cards in a deck, and 4 of them are aces. The probability of turning over an ace is 4/52.

Question

Which of the following is an example of theoretical probability?
  		A. 	There were 73 people in a grocery store, and 45 of them bought milk. The probability of people buying milk is 45/73.
  		B. 	Kenny rolled a number cube 9 times and got 4 even numbers. The probability of an even number is 4/9.
  		C. 	Wendy flipped a coin 5 times, and the results were 4 tails. The probability of tails is 4/5.
  		D. 	There are 52 playing cards in a deck, and 4 of them are aces. The probability of turning over an ace is 4/52.