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The CIA has specialists who analyze frequencies of letters of the alphabet in an attempt to decipher intercepted messages.In standard English text, the letter r

The CIA has specialists who analyze frequencies of letters of the alphabet in an attempt to decipher intercepted messages.In standard English text, the letter r is used at a rate of 8.4%.Find the mean and standard deviation for the number of times the letter r will be found on a typical page of 2600 characters.

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