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A 3-place code has 5 choices for each place, and repetition is allowed. How many codes are possible?

Answer and explanation

Correct answer: 125 codes

Each of the 3 places has 5 choices, including when a choice is repeated. Thus, the number of codes is 5 × 5 × 5 = 125.

Related tags

Fundamental Principle Of CountingRepetition AllowedPermutations And CombinationsMathematicsClass 11 Mcq

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