S.CP.B.7: Apply the Addition Rule, P(A or B) = P(A) + P(B) – P(A and B), and interpret the answer in terms of the model.

Apply the Addition Rule, P(A or B) = P(A) + P(B) – P(A and B), and interpret the answer in terms of the model.

Example Problems

How many unique ways are there to arrange the letters in the word

\text{GOALS}

?

How many unique ways are there to arrange the letters in the word BALLOON?

How many unique ways are there to arrange the letters in the word

\text{STATISTICS}

?

1-on-1 AI tutoring aligned to S.CP.B.7. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.