Problema Solution
You have a quarter, a dime, and two pennies in your pocket. What is the probability that you can match the change part of your bill for any purchase?
Answer provided by our tutors
There are 100 possible ways you might need to make change for a given transaction (assuming 0 cents is also a possibility).
Using your change, you can make the following amounts of change: .00 .01 .02 .10 .11 .12 .25 .26 .27 .35 .36 .37 for a total of 12 possible ways.
Thus the probability of making correct change is: 12/100 = 3/25 = 0.12 or 12%.