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.
There are 8 possible outcomes ....... tth hth etc Only ONE does not have a t in it hhh the other 7 outcomes all have at LEAST one t