SOLUTION: In how many ways can the letters of the word ALLAHABAD be arranged so that the vowels can occupy only even positions.
Algebra ->
Permutations
-> SOLUTION: In how many ways can the letters of the word ALLAHABAD be arranged so that the vowels can occupy only even positions.
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You can put this solution on YOUR website! here 4 vowels and all are 'A'
here total 9 places.. 5 odds and 4 even places i.e OEOEOEOEO
no. of ways to arrange four 'A' at 4 places = 4P4/4! = 1
no. of ways to arrange 5 consonants where there are 2 'L' = 5!/2! = 60
total no. of ways = 1* 60 = 60
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