Sadlier-Oxford :: Problem of the Day: Fundamentals of Algebra


Mathematics Fundamentals of Algebra Student Center Progress in Mathematics K-8+ Authors National Math Advisory Board Preparing for Fundamentals of Algebra Prerequisite Skills Skills Update Problem of the Day Practice Activities Acceleration Box Practice Activities Vocabulary Activities Alternative Teaching Models Virtual Manipulatives Audio Glossary Enrichment Graphing Calc. Lessons Graphing Calc. Videos Teacher Center Progress in Mathematics K-8+ Sign Up Log In Grade K Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Fundamentals of Algebra Foundations of Algebra Algebra 1 Family Center Progress in Mathematics K-8+ Authors National Math Advisory Board Prerequisite Skills Preparing for Fundamentals of Algebra Skills Update Problem of the Day Practice Activities Acceleration Box Practice Activities Vocabulary Activities Alternative Teaching Models Virtual Manipulatives Audio Glossary Enrichment Graphing Calc. Lessons Graphing Calc. Videos	K 1 2 3 4 5 6 Fundamentals of Algebra Foundations of Algebra Algebra 1 Print Email Sadlier-Oxford Home » Problem of the Day: Fundamentals of Algebra $Problem of the Day$ Chapter 12, Lesson 7 A box contains three colors of marbles: black, white, and blue. There are 6 more white marbles than black marbles and twice as many yellow marbles as black marbles. In all, there are 30 marbles. Martin selects a marble at random from the box. What is the probability that the marble he selected is either black or white? Explain your reasoning.