Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
The probability rule stating that P(A) + P(A^c) = 1, or equivalently P(A) = 1 - P(A^c), used to calculate the probability of an event by subtracting the complement from 1.