document.write( "Question 1152872: How many different license plates with repetition involving 3 letters and 4 digits if 3 letters must appear together at the beginning or at the end of plate. \n" ); document.write( "

Algebra.Com's Answer #774993 by rothauserc(4718) $\"\"$ $\"About$

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There are 26 letters(A-Z) and 10 digits(0-9)
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\n" ); document.write( "Since letters can repeat, we have 26^3 permutations to form letters on the license plate
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\n" ); document.write( "Since the digits can repeat, we have 10^4 permutations to form digits on the license plate
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\n" ); document.write( "Since the letters can appear at the front or the back, we multiply by 2
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\n" ); document.write( "Therefore,
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\n" ); document.write( "There are 2 * 26^3 * 10^4 = 351,520,000 license plates
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