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How many 7-digit phone numbers can be formed if the first digit cannot be 0 or 1 and if no digit can be repeatd?
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How many 7-digit phone numbers can be formed if the first digit cannot be 0 or 1 and if no digit can be repeatd?

User Imran Ali
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1 Answer

4 votes
8x10x9x8x7x6x5= 1209600
User PoeHaH
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