Question

a set of cards contains cards numbered 1 – 8. mrs. jacobs 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

Explanation:

Step1: Find probability of drawing 4

There are 8 cards (1 - 8), so probability of drawing 4 is $\frac{1}{8}$.

Step2: Calculate expected number of trials

Multiply probability by number of trials (1000): $1000\times\frac{1}{8}=125$.

Answer:

125