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A three-digit number is formed with the hundreds digit chosen from {2, 4, 6}, the units digit chosen from {2, 3, 5, 7}, and the tens digit chosen from 0 to 9. Repetition is allowed. How many numbers can be formed?

Answer and explanation

Correct answer: 120 numbers

There are 3 choices for the hundreds digit, 10 for the tens digit, and 4 for the units digit. By the fundamental counting principle, the total is 3 × 10 × 4 = 120 numbers.

Related tags

Fundamental Counting PrincipleClass 11 MathematicsFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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