A Four Or Five Digit Pin Is To Be Selected From The Seven Digits 0 1 2 3 4 5 6 1 How Many 4 Digit Pins Are Possible If 1 (28.37 KiB) Viewed 42 times
A Four Or Five Digit Pin Is To Be Selected From The Seven Digits 0 1 2 3 4 5 6 1 How Many 4 Digit Pins Are Possible If 2 (30.08 KiB) Viewed 42 times
A four or five-digit PIN is to be selected from the seven digits 0,1,2,3,4,5,6. 1. How many 4-digit PINS are possible if: a) all 4 digits are the same? e.g. 1-1-1-1 b) no digit can be repeated? c) any digit can be repeated? d) the first 2 digits must be different digits and the last 2 digits must be the same, but none of the first 2 digits can be used in the last 2?
2. Suppose any digit can be repeated, how many 4-digit PINs are possible if each PIN: a) must end with "3"? b) must not start with "1"? c) must neither start with "4" nor end with "4"? 3. Suppose no digit can be repeated, how many 5-digit PINs are possible if each PIN: a) must end with "3"? b) must not start with "1"? c) must neither start with "4" nor end with "4"?
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