Coco flips a penny, a nickel, and a quarter. Each coin is fair (meaning that heads and tails are equally likely to come up). What is the probability that at least one of the coins comes up heads?
Enter your answer as a fraction in simplified form.
The probability of getting NO heads =1/2^3 =0.125. Then the probability of getting at least 1 head is:
1 - 0.125 =0.875