Probability is a measure of how likely events are to occur, calculated as the number of desired outcomes divided by the total number of possible outcomes. For a coin toss with two possible outcomes (heads or tails), the probability of getting heads is 1/2 or 0.5. Some boys playing cricket decided to toss a coin to determine teams, with heads as the desired outcome. The probability of getting heads from a single coin toss can be calculated as 1 (the number of desired outcomes) divided by 2 (the total number of possible outcomes from the coin toss).