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Byju's Answer
Standard XII
Mathematics
Combination with Restrictions
The number of...
Question
The number of arrangements of
A
1
,
A
2
.
.
.
.
,
A
10
in a line so that
A
1
is always above than
A
2
, is
A
2
×
10
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B
1
2
×
10
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C
10
P
2
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D
10
C
2
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Solution
The correct option is
B
1
2
×
10
Total number of arrangement in which
A
1
is always above than
A
2
=
1
2
(
10
!
)
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0
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