Question

6. Food Express is running a special promotion in which customers can win a free gallon of milk with their food purchase if there is a star on their receipt. So far, 147 of the first 156 customers have not received a star on their receipts. What is experimental probability of winning a free gallon of milk?

A. 11/156
B. 49/52
C. 2/39
D. 3/52*****?

Answer 1

Experimental probability is the change that something will occur based on what has already happened.

If 147 people have not won, this means that 9 people have won.

9 have won/156 total customers simplifies to 3/52.

3/52 is the experimental probability of winning a free gallon of milk.

Answer 2

$|\Omega|=156\\ |A|=156-147=9\\\\ P(A)=\dfrac{9}{156}=\dfrac{3}{52}\implies \text{D}$