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A school identity plate has (3) shapes and (10) colors available. In how many ways can one shape and one color be chosen?

Answer and explanation

Correct answer: (30) ways

This question uses the multiplication principle because each final identity-plate design contains two choices: one shape and one color. There are 3 possible shapes, and for each shape any of the 10 colors may be used. Therefore, the total number of shape-color combinations is 3 × 10 = 30. Option C is correct. The answer 13 comes from adding the numbers, which would count alternatives rather than complete designs. The value 20 has no basis in the stated choices, and 33 is another incorrect sum-like result. Both components are required, so their possibilities must be multiplied.

Related tags

Fundamental Principle Of CountingMultiplication RuleDesign CombinationsPermutations And CombinationsMathematicsClass 11 Mcq

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