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Standard XII
Mathematics
Sum of n Terms
How many word...
Question
How many words, with or without meaning, can be formed using all letters of the word EQUATION, using each letter exactly once?
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Solution
The word
E
Q
U
A
T
I
O
N
has exactly
8
letters which all are different.
A number of words that can be formed.
=
number of permutations of
8
letters taken all at a time
=
P
(
8
,
8
)
=
8
!
=
8
×
7
×
6
×
5
×
4
×
3
×
2
×
1
=
40320
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