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How many numbers between 100 an 1000 can be formed with the digits 5, 6, 7, 8, 9, if the repetition of digits is not allowed ?A. `3^(5)`B. `5^(3)`C. 120D. 60 |
Answer» Correct Answer - D Number between 100 and 1000 are 3-digit numbers. It is given that the digits should not be repeated. Number of given digits = 5 In a 3-digit number, first number can be arranged in 5 ways. Second number in 4 ways. Third number is 3 ways `:.` Numbers that can be formed `= 5 xx 4 xx 3 = 60` |
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