Of the last 100 customers entering a computer shop, 25 have purchased a computer. If the relative frequency method for computing probability is used, the probability that the next customer will purchase a computer is _____.
A) .25
B) .50
C) 1
D) .75

Question

Quizplus · Accepted Answer

The relative frequency method for computing probability looks at the proportion of occurrences of an event in a sample. In this case, 25 out of the last 100 customers purchased a computer. Therefore, the probability of the next customer purchasing a computer is the same as the proportion of customers who have made a purchase in the past, which is 25/100 or 0.25 (25%). Therefore, choice A is correct.

Of the Last 100 Customers Entering a Computer Shop, 25