MathematicsGeneralQuality 92 · Exceptional

Basic Probability Rules in Plain Terms

Ruth Nelson Verified Teacher

@author · 2026-09-03 · v1

7 min read

The probability of an event ranges from 0 to 1. For independent events,

P(A \text{ and } B) = P(A) \times P(B)

. If two dice are rolled, the chance both show six is

\frac{1}{6} \times \frac{1}{6} = \frac{1}{36}

. For mutually exclusive events, add instead:

P(A \text{ or } B) = P(A) + P(B)

0 teacher endorsements

Discussion

Comments support LaTeX — write $\int_0^1 x^2\,dx$ inline with $...$ .

No comments yet

Be the first to share your thoughts.