A set of cards contains cards numbered 1 – 8. Mrs. Jacob’s class is conducting an experiment in which a card is drawn from the pile, the number is recorded, and then the card is returned to the set. The class will conduct 1,000 trials. Based on the theoretical probability, which is the best prediction for the number of times a 4 will be drawn from the pile?
111
125
143
250
According to theoretical probability, each number has an equal chance of being drawn, so the probability of drawing a 4 is 1/8 for each trial.
Therefore, the best prediction for the number of times a 4 will be drawn from the pile in 1,000 trials is:
Probability of drawing a 4 x Number of trials = 1/8 x 1000 = 125
Therefore, the best prediction is 125 times.
So, the correct answer is 125.