Problem preview
S-CP.4 Warmup M2-066-A13-V01

Construct and interpret two-way frequency tables as sample spaces for independence and conditional probability.

Choose the correct denominator for a percent from a two-way table

Problem

For “percent of freshmen who ride the bus,” identify the table total representing the conditioned group named after “of.”

Big Picture

What this problem is really about

In a percent-of phrase, the group named after of supplies the denominator. We’ll identify freshmen as the conditioned reference group, locate the bus-riding intersection as the numerator, use the entire freshman row margin below it, and distinguish that denominator from the bus column and grand total.

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Four variants of this problem type
Curriculum context
Course
Math II
Standard
S-CP.4
Category
Statistics and Probability
Domain
Conditional Probability and the Rules of Probability
Objective
Construct and interpret two-way frequency tables as sample spaces for independence and conditional probability.
Problem type
Choose the correct denominator for a percent from a two-way table