document.write( "Question 358137: Using the letters of the word YOUNG, tell how many different 5-letter combinations are possible if:\r
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document.write( "a) The first letter must be Y\r
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document.write( "b) The vowels and consonants alternate,beginning with a consonant (Y is a consonanthere and Y does not have to be first)\r
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document.write( "Please help im lost with this question i would appreciate it \n" );
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Algebra.Com's Answer #255644 by Edwin McCravy(20055)![]() ![]() You can put this solution on YOUR website! Using the letters of the word YOUNG, tell how many different 5-letter combinations are possible if:\r \n" ); document.write( "\n" ); document.write( "a) The first letter must be Y \n" ); document.write( " \r\n" ); document.write( "Y _ _ _ _\r\n" ); document.write( "\r\n" ); document.write( "There is 1 way to choose the 1st letter, since it must be a Y.\r\n" ); document.write( "There are 4 letters left to choose for the 2nd letter.\r\n" ); document.write( "There will then be 3 letters left to choose for the 3rd letter.\r\n" ); document.write( "There will then be 2 letters left to choose for the 4th letter.\r\n" ); document.write( "There will then be only 1 letter left to choose the for 5th letter.\r\n" ); document.write( "\r\n" ); document.write( "Answer 1*4*3*2*1 = 24.\r\n" ); document.write( "\r\n" ); document.write( "Checking:\r\n" ); document.write( "\r\n" ); document.write( " 1. YOUNG\r\n" ); document.write( " 2. YOUGN\r\n" ); document.write( " 3. YONUG\r\n" ); document.write( " 4. YONGU\r\n" ); document.write( " 5. YOGUN\r\n" ); document.write( " 6. YOGNU\r\n" ); document.write( " 7. YUONG\r\n" ); document.write( " 8. YUOGN\r\n" ); document.write( " 9. YUNOG\r\n" ); document.write( "10. YUNGO\r\n" ); document.write( "11. YUGON\r\n" ); document.write( "12. YUGNO\r\n" ); document.write( "13. YNOUG\r\n" ); document.write( "14. YNOGU\r\n" ); document.write( "15. YNUOG\r\n" ); document.write( "16. YNUGO\r\n" ); document.write( "17. YNGOU\r\n" ); document.write( "18. YNGUO\r\n" ); document.write( "19. YGOUN\r\n" ); document.write( "20. YGONU\r\n" ); document.write( "21. YGUON\r\n" ); document.write( "22. YGUNO\r\n" ); document.write( "23. YGNOU\r\n" ); document.write( "24. YGNUO\r\n" ); document.write( " \n" ); document.write( "b) The vowels and consonants alternate,beginning with a consonant (Y is a consonant there and Y does not have to be first) \n" ); document.write( " \r\n" ); document.write( "They can only alternate this way:\r\n" ); document.write( "\r\n" ); document.write( "consonate, vowel, consonant, vowel, consonant\r\n" ); document.write( "\r\n" ); document.write( "There are 3 consonants to choose for the 1st letter.\r\n" ); document.write( "There are 2 vowels to choose for the 2nd letter.\r\n" ); document.write( "There will then be 2 consonants left to choose for the 3rd letter.\r\n" ); document.write( "There will then be only 1 vowel left to choose for the 4th letter.\r\n" ); document.write( "There will then be only 1 consonant left to choose for the 5th letter.\r\n" ); document.write( "\r\n" ); document.write( "That's 3*2*2*1*1 = 12 ways\r\n" ); document.write( "\r\n" ); document.write( "Checking:\r\n" ); document.write( "\r\n" ); document.write( " 1. YONUG\r\n" ); document.write( " 2. YUNOG\r\n" ); document.write( " 3. YOGUN\r\n" ); document.write( " 4. YUGON\r\n" ); document.write( " 5. NOYUG\r\n" ); document.write( " 6. NUYOG\r\n" ); document.write( " 7. NOGUY\r\n" ); document.write( " 8. NUGOY\r\n" ); document.write( " 9. GONUY\r\n" ); document.write( "10. GUNOY\r\n" ); document.write( "11. GOYUN\r\n" ); document.write( "12. GUYON\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |