Probability & Counting

Free

Grades 7–8AlgebraGuided journey: Discover, Learn, Practice, Apply

How likely is it, on a scale from 0 to 1? Predict a probability from the setup (theoretical) or measure it from trials (experimental), count a sample space, chain compound events with tree diagrams, tell independent from dependent events, and count arrangements with permutations and combinations. Companion to Statistics & Probability (Grade 7). Aligned to CCSS 7.SP.C.5-8.

What you’ll learn

Probability is favorable over total outcomes, always between 0 and 1.
Theoretical comes from the setup; experimental is successes over trials and converges to theoretical.
Count a sample space by listing or by multiplying the choices at each stage.
For compound events, "and" multiplies and "or" (non-overlapping) adds.
Order matters for permutations; it does not for combinations, which are fewer.

Aligned to 7.SP.C.5, 7.SP.C.6, 7.SP.C.7, 7.SP.C.8

Probability & Counting

Free

Grades 7–8AlgebraGuided journey: Discover, Learn, Practice, Apply

How likely is it, on a scale from 0 to 1? Predict a probability from the setup (theoretical) or measure it from trials (experimental), count a sample space, chain compound events with tree diagrams, tell independent from dependent events, and count arrangements with permutations and combinations. Companion to Statistics & Probability (Grade 7). Aligned to CCSS 7.SP.C.5-8.

What you’ll learn

Probability is favorable over total outcomes, always between 0 and 1.
Theoretical comes from the setup; experimental is successes over trials and converges to theoretical.
Count a sample space by listing or by multiplying the choices at each stage.
For compound events, "and" multiplies and "or" (non-overlapping) adds.
Order matters for permutations; it does not for combinations, which are fewer.

Aligned to 7.SP.C.5, 7.SP.C.6, 7.SP.C.7, 7.SP.C.8