If repetition of digits is not allowed how many numbers of four
digits divisible by 5 can be formed with the digits 0, 4,5,6,7?
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Number ending with either 0 or 5 is divisible by 5
Case 1) unit place is 0
Numbers=6×5×4=120
Case 2) unit digit is 5
Numbers =5×5×4=100
∴ total number =120+100=220
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