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A (3)-digit number is formed from (2,3,4,5,6,7). The number must be less than (400), and digits may repeat. How many numbers are possible?

Answer and explanation

Correct answer: (2 \times 6 \times 6=72)

The hundred place can only be (2) or (3), and each remaining place has (6) choices. Apply the bound condition to the highest place.

Related tags

CountingDigitsLess-ThanFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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