Lemma
EasyCounting & chance
OpenStax, Prealgebra 2e §5.5 Averages and Probability · Try It 3 · Probability · Counting & chance

Averages and Probability · Try It 3

The ages of the four students in Ben’s carpool are Find the mean age of the students.

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OpenStax, Prealgebra 2e · §5.5 Averages and Probability · Try It 3

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