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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingEasy
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How many (2)-digit numbers can be formed from digits (0,1,2,3,4) if repetition is allowed?

Answer and explanation

Correct answer: (20)

The tens place cannot be (0), so it has (4) choices and the units place has (5). Total ways are (4\times5=20).

Related tags

Permutations And CombinationsCounting PrincipleDigitsFundamental Principle Of CountingMathematicsClass 11 Mcq
सुधार सुझाएँ / Earn

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