Name of the Exchange

In Great Britain some years back the first three letters of a telephone number used to indicate the name of the exchange. How many such arrangements of 3 letters is it possible to devise from the 26 letters of the alphabet?

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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

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