How many different positive, six-digit integers can be formed using the digits 2, 2, 5, 5, 9 and 9?
Question:
How many different positive, six-digit integers can be formed using the digits 2, 2, 5, 5, 9 and 9?
Answer:
Let's think step by step.

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90
How many different positive, six-digit integers can be formed using the digits 2, 2, 5, 5, 9 and 9?
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