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AP and TS EAMCET Engineering Model Paper 4
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© examsnet.com
Question : 29
Total: 160
If
9
P
5
+
5
.
9
P
4
=
10
P
r
Then r is
5
4
3
7
Validate
Solution:
n
P
r
+
r
.
n
P
r
−
1
=
n
+
1
P
r
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