
In Example 1, note the different ways that the probabilities can be written.
 The probability of a meteoroid hitting Earth, 0.75, can also be written as or 75%.
 The probability of Apophis hitting Earth, 0, can also be written as 0%.
 The probability of 2000 SG344 hitting Earth, , can also be written as 0.0023 or 0.23%.
 The probability of 2008 TC3 hitting Earth, 1, can also be written as 100%.

When meteorologists provide a weather forecast, they are determining how likely a certain weather pattern is to occur within a given time. Typically, forecasts reach a range of 7 to 10 days into the future. For more information on weather forecasting, visit the National Weather Service.

 Equally likely to happen or not happen; it is generally considered that there is a 5050 chance that a given person will be male or female. So, there is a 50% chance that a family's oldest child is a girl.
 Unlikely; Assuming there is a 50% chance that a child is a girl, there is a (0.50)(0.50) = 0.25 or 25% chance that both children are girls.

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