Dice Average Explained: Expected Rolls for D4–D20 and More Short answer: The average roll of a single die is (1 + sides) / 2 — so a d20 averages 10.5, a d6 averages 3.5, and a d4 averages 2.5. For several dice, add the individual averages together: 2d6 averages 7.0, and 1d20+5 averages 15.5. Rolling…
Running Average Explained: Cumulative, Moving & Exponential Short answer: A running average is an average that updates as each new value arrives, instead of being calculated once at the end. There are three common kinds: the cumulative average, which averages everything seen so far; the simple moving average (SMA), which averages only the most recent…
Grade Average & GPA Guide: How to Calculate Your Grades Short answer: To find your grade average, add up all your grades and divide by how many grades there are. To find your GPA on the common US 4.0 scale, convert each letter grade to grade points (A = 4.0, B = 3.0, C =…
Understanding Weighted Averages: Formula, Examples & Mistakes Short answer: a weighted average gives some values more influence than others. Multiply each value by its weight, add the products, and divide by the total weight — the result is pulled toward the biggest weights. Weighted averages are everywhere: course grades where the final counts double, GPAs…
Average vs Mean Explained: Are They the Same Thing? Short answer: in everyday use, yes — “average” almost always means the arithmetic mean. When someone says “the average test score is 86.6” or “the average temperature this week was 20 degrees,” they added the numbers up and divided by how many there were. That is…