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, 219 of the first 264 customers have not received a star on their receipts. What is the experimental probability of winning a free gallon of milk?
Choices:
A - 3/88
B - 15/88
C - 73/88
D - 1/78
I choose C because 219 / 3 = 73 and 264 / 3 = 88
= 73/88
The correct answer is B - 15/88
How do you get this?

Question

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, 219 of the first 264 customers have not received a star on their receipts. What is the experimental probability of winning a free gallon of milk?
Choices:
A - 3/88
B - 15/88
C - 73/88
D - 1/78
I choose C because 219 / 3 = 73 and 264 / 3 = 88
= 73/88
The correct answer is B - 15/88
How do you get this?

anonymous · Answer

well....I am not the best at this, but here it goes...
experimental probability is : number of times the event occurs / total number of trials.

number of times event (CAN) occur = 264 - 219 = 45
total number of trials = 264

45/264 reduces to 15/88

shiree19 · Answer

Ok.  Thanks so much.  I understand it now.

anonymous · Answer

glad to help :)