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A name plate has (9) letter styles and (2) border colors. How many ways are there to choose one style and one border color?

Answer and explanation

Correct answer: 18

For each of the 9 letter styles, either of the 2 border colours can be chosen. Therefore, by the fundamental principle of counting, the total number of ways is \(9 \times 2=18\). Adding the numbers to get \(11\) is incorrect because one style and one colour are chosen together. Exam tip: Multiply the numbers of choices when independent selections are made together.

Related tags

Fundamental Principle Of CountingMultiplication RulePermutations And CombinationsClass 11 MathematicsCounting TechniquesMathematicsClass 11 Mcq

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