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UPSEE 2019 Solved Paper
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© examsnet.com
Question : 136
Total: 150
The value of
20
!
+
21
!
1
!
+
22
!
2
!
+
.
.
.
.
.
+
60
!
40
!
is
20
!
61
C
20
21
!
60
C
20
20
!
61
C
21
21
!
61
C
19
Validate
Solution:
We have,
20
!
+
21
!
1
!
+
22
!
2
!
+
.
.
.
.
.
+
60
!
40
!
=
20
!
[
1
+
21
!
20
!
1
!
+
22
!
20
!
2
!
+
.
.
.
.
+
60
!
40
!
20
!
]
=
20
!
[
21
C
0
+
21
C
1
+
22
C
2
+
.
.
.
.
+
60
C
40
]
=
20
!
[
22
C
1
+
22
C
2
+
.
.
.
.
.
.
+
60
C
40
]
[
∵
n
C
r
−
1
+
n
C
r
=
n
+
1
C
r
]
=
20
!
[
61
C
40
]
=
20
!
.
61
C
21
© examsnet.com
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