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Mathematics, 03.07.2019 20:30 figueroajorge8291
How many phone numbers can be made if the first digit must be 1, the second digit mustbe a number in the range 3-5, the third digit must be a number in the range (6-9), and the last seven digits can be any single digit number 0-9?
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How many phone numbers can be made if the first digit must be 1, the second digit mustbe a number in...
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