In Canada, the postal codes are three numbers and three letters. The characters of the postal codes always alternate, starting with a letter: letter number letter number letter number. For example, a home in Ontario has postal code N0G 2O2. (Notice that both the letter O and the number 0 are allowed, and the letters and numbers may be repeated.) a) How many possible postal codes are there in Canada? (Remember: there are twenty-six letters in the Canadian alphabet.) b) What is the probability that a Canadian postal code doesn't have any repeated letters or numbers? (e.g, the above postal code has the number 2 repeated) c) What is the probability that a Canadian postal code does have one or more repeated letters or numbers?
In Canada, the postal codes are three numbers and three letters. The characters of the postal codes always alternate, starting with a letter: letter number letter number letter number. For example, a home in Ontario has postal code N0G 2O2. (Notice that both the letter O and the number 0 are allowed, and the letters and numbers may be repeated.)
a) How many possible postal codes are there in Canada? (Remember: there are twenty-six letters in the Canadian alphabet.)
b) What is the probability that a Canadian postal code doesn't have any repeated letters or numbers? (e.g, the above postal code has the number 2 repeated)
c) What is the probability that a Canadian postal code does have one or more repeated letters or numbers?
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