By Mark Kennan, Updated August 30, 2022

Probability measures the chances that a specific event will happen. It’s calculated by dividing the count of favorable outcomes by the total number of possible outcomes. A scientific calculator simplifies this process, making it invaluable in applications ranging from gambling to data analysis.

For example, in poker, evaluating the probability of forming a straight or a flush can guide whether to call a bet or fold. Knowing the odds helps you make informed, statistically grounded decisions.

Step 1: Enter the number of successful outcomes

Suppose you have a bag with 25 balls, 5 of which are red. Type 5 as the numerator.

Step 2: Press the division key

Hit the “÷” button on your calculator.

Step 3: Enter the total number of outcomes

Enter 25 as the denominator, representing the total balls you could draw.

Step 4: Press equals to see the result

The calculator will display a decimal. Here, the probability of drawing a red ball is 0.20, or 20 %.