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An Internet banking system uses passwords that are six characters, and each character is one of the 26 letters (a–z) or 10 digits (0–9)
An Internet banking system uses passwords that are six characters, and each character is one of the 26 letters (a–z) or 10 digits (0–9). The first character has to be a letter. Determine the proportion of passwords that:
(a) begins with a consonant;
(b) ends with an even number (0, 2, 4, 6, 8);
(c) begins with a consonant or ends with an even number.
You may assume that passwords are not case sensitive.
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