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Byju's Answer
Standard VIII
Mathematics
Finding Alpha Numeral
How many thre...
Question
How many three digit even numbers can formed using the digits 1, 2, 3, 4, and 6, with no digits repeated
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Solution
Dear student
Three
digit
even
numbers
are
to
be
formed
using
the
given
5
digits
1
,
2
,
3
,
4
and
6
without
repeating
the
digits
.
Then
,
units
digits
can
be
filled
in
3
ways
by
any
of
the
digits
2
,
4
or
6
.
Since
the
digits
cannot
be
repeated
in
the
three
digit
numbers
and
units
place
is
already
occupied
with
a
digit
(
which
is
even
)
,
the
hundreds
and
tens
place
is
to
be
filled
by
the
remaining
4
digits
So
,
the
number
of
ways
in
which
hundreds
and
tens
place
can
be
filled
with
the
remaining
4
digits
is
the
permutation
of
4
different
digits
taken
2
at
a
time
.
number
of
ways
of
filling
hundreds
and
tens
place
=
4
P
2
=
4
!
4
-
2
!
=
12
Thus
by
multiplication
principle
,
the
required
number
of
three
digit
number
is
=
3
×
12
=
36
Regards
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