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A digital certificate has 4 title styles, 3 seals, 5 borders, and 2 signature colors. How many designs are possible?

Answer and explanation

Correct answer: 120 designs

This uses the fundamental principle of counting. A complete certificate design is formed by making one choice from each independent category: title style, seal, border, and signature color. Thus the first component can be chosen in 4 ways, the second in 3 ways, the third in 5 ways, and the fourth in 2 ways. The total number is 4 × 3 × 5 × 2 = 12 × 10 = 120. Hence option C is correct. The value 60 omits one factor or combines the choices incorrectly; 90 and 240 also do not equal the product of all four independent choice counts. No arrangement formula is needed because the task is selecting one feature from each separate category.

Related tags

Fundamental Principle Of CountingProduct RuleCombinatoricsPermutations And CombinationsMathematicsClass 11 Mcq

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