Arranging Letters in Mathematics

In summary, there are 6 vowels that can be chosen for position 1, leaving 10 letters to choose from for the rest of the positions. For position 11, there are 9 letters to choose from (excluding h), and the remaining 9 letters can be arranged in 9 factorial ways. Therefore, the total number of arrangements of the letters in the word mathematics that begin with a vowel and end with a letter other than h is 6 x 10 x 9 factorial, which is equal to 3,628,800.
  • #1
CanadianEh
33
0
How many arrangements of the letters in the word mathematics begin with a vowel and end with a letter other than h?


Please help!
 
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  • #2
CanadianEh said:
How many arrangements of the letters in the word mathematics begin with a vowel and end with a letter other than h?


Please help!

How would you go about approaching this problem? I assume the arrangements of letters do not have to make real words from the dictionary? Do all the words have to be the same length as the word mathematics?
 
  • #3
MATHEMATICS

so you have 11 letters.


_ _ _ _ _ _ _ _ _ _ _
1 2 3 4 5 6 7 8 9 10 11 (letter position)

Each space for each letter.

You want position 1 to be a vowel. How many vowels do you have? So for position 1, how many ways can you select a vowel to start this arrangement? So in position 1, write down the number of vowels you can choose from.

By writing the number of vowels you can start with, you have in essence chosen a vowel to start with. How many letters are left to choose from? (This includes h).

Hence in position 11, how many letters can you put there excluding h?

Now how many letters do you have left? How many ways can you arrange the rest of letters in the remaining 9 spaces?
 

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