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In an online registration there are (3) courses, (4) batches and (5) payment options. How many registration types are possible?

Answer and explanation

Correct answer: (60) types

The governing idea is the fundamental principle of counting. A complete registration type is determined by three independent selections: one course, one batch and one payment option. There are 3 choices for the course. For every chosen course, any of the 4 batches may be selected, producing 3 × 4 = 12 course-batch combinations. Each of those combinations can be paired with any of the 5 payment options. Therefore the total is 3 × 4 × 5 = 60 registration types. Option D is correct. Option A counts only course-batch pairs, option B multiplies only two of the given numbers, and option C is an incorrect product; none of these counts includes all three required decisions correctly.

Related tags

Permutations-CombinationsFundamental-Principle-Of-CountingIndependent-ChoicesFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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