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Summary: This module provides sample problems which develop concepts related to groupings and combinations of groups, in preparation for later questions about probability.
A group of high school students is being divided into groups based on two characteristics: class (Freshman, Sophomore, Junior, or Senior) and hair color (blond, dark, or red). For instance, one group is the “red-haired Sophomores.” How many groups are there, total?
According to some sources, there are approximately 5,000 species of frog. Within each species, there are three types: adult female, adult male, and tadpole. If we divide frogs into groups according to both species and type—so one group is “adult females of the species Western Palearctic Water Frog”—how many groups are there?
Suppose I roll a normal, 6-sided die, and flip a normal, 2-sided coin, at the same time. So one possible result is “4 on the die, heads on the coin.”
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This work is licensed by Kenny M. Felder under a Creative Commons Attribution License (CC-BY 2.0), and is an Open Educational Resource.
Last edited by Kenny M. Felder on Jan 7, 2009 4:02 pm -0600.
"This is the "main" book in Kenny Felder's "Advanced Algebra II" series. This text was created with a focus on 'doing' and 'understanding' algebra concepts rather than simply hearing about them in […]"