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Byju's Answer
Standard VII
Mathematics
Probability
If the letter...
Question
If the letters of the word ASSASSINATION are arranged at random.Find the probability that no two A's are coming together?
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Solution
Dear Student
Total
number
of
arrangements
of
the
letters
of
the
word
ASSASSINATION
=
13
!
3
!
.
4
!
.
2
!
.
2
!
=
10810800
Other
than
3
A
'
s
there
are
10
letters
that
can
be
arranged
in
10
!
4
!
.
2
!
.
2
!
ways
i
.
e
.
37800
ways
.
There
are
11
places
,
9
between
10
letters
and
one
on
extreme
left
and
other
on
extreme
right
.
To
seperate
3
A
'
s
we
arrange
them
in
these
11
places
.
This
can
be
done
in
C
3
11
ways
or
165
ways
.
Number
of
ways
in
which
no
two
A
'
s
are
together
=
37800
×
165
=
6237000
Required
probability
=
6237000
10810800
=
15
26
Regards
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