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The possible ways to complete a multiple-choice test consisting of 20 questions, with each question having four possible answers (a, b, c, or d).
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Use the counting principle to determine the number of elements in the sample space.
The possible ways to complete a multiple-choice test consisting of 20 questions, with each question having four possible answers (a, b, c, or d).
Answered by math
Two-digit natural numbers are formed, with replacement, from the digits 0 through 9.

How many two-digit odd numbers are possible?
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