document.write( "Question 623665: How many different 4 letter radio station call letters can be made if the first letter must be K or W, repeats are allowed, but the call letters cannot end in an O? please explain. \n" ); document.write( "
Algebra.Com's Answer #392212 by math-vortex(648)\"\" \"About 
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document.write( "Hi, there--\r\n" );
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document.write( "The Problem: \r\n" );
document.write( "How many different 4 letter radio station call letters can be made if the first letter must be K or W,\r\n" );
document.write( "repeats are allowed, but the call letters cannot end in an O?\r\n" );
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document.write( "A Solution:\r\n" );
document.write( "In combinatorics, the basic counting principle states that if we have m ways of doing something \r\n" );
document.write( "and n ways of doing another thing, then there are m · n ways of performing both actions.\r\n" );
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document.write( "We can use this idea to solve your radio station problem.\r\n" );
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document.write( "There are 2 ways to choose the first letter of the radios call sign; it must be either K or W.\r\n" );
document.write( "There are 26 ways to choose the second letter because it can be any letter (repeats are OK.)\r\n" );
document.write( "There are 26 ways to choose the third letter.\r\n" );
document.write( "There are 25 ways to choose the fourth letter because it can be any letter but O.\r\n" );
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document.write( "Using the basic counting principle, we multiply,\r\n" );
document.write( "2*26*26*25 = 33800\r\n" );
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document.write( "There are 33,800 ways to choose the call letters.\r\n" );
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document.write( "Feel free to email me if you have questions about the solution.\r\n" );
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document.write( "Ms.Figgy\r\n" );
document.write( "math.in.the.vortex@gmail.com\r\n" );
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