In a three letter password, what is the probability that all three letters are same?
Explanation:
Favourable passwords = {AAA, BBB, CCC, ..., ZZZ} i.e., 26 favourable passwords.
Total number of 3 letter passwords that can be formed = 26 × 26× 26 = 263
∴ Required probability = 26/263 = 1/262.
Hence, option (b).
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