Probability
STEP 1 · LEARN
Probability is the likelihood of a specific outcome happening, usually expressed as a percentage or a fraction of all possible outcomes.
Probability describes what should happen on average — not what will happen on any single occurrence.
STEP 2 · SEE
P = Favorable Outcomes ÷ Total Outcomes
STEP 3 · PRACTICE
If a digit has a 1-in-10 chance of appearing, its probability is...
A1%
B10%
C50%
D100%
CORRECT ✓
1 out of 10 possible outcomes equals a probability of 10%.
NOT QUITE
Divide the favorable outcome (1) by the total outcomes (10), then convert to a percentage.