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How many 3-digit numbers can be formed by using the digits 1 to 9, if no digit is repeated? |
80 224 288 504 |
224 |
Given 3 digit numbers that can be formed using the digits from 1 to 9. Required number of 3-digit numbers= arranging 3 digits with the total number of 9 digits. = 9P3 = (9×8×7) = 504. Hence, the required number of numbers = 504. |
