WBJEE 2012 Math Solved Paper

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Question : 10 of 80
 
Marks: +1, -0
Let
(1+x)10=
10
∑
r=0
crxr
and (1+x)7=
7
∑
r=0
drxr
.
If P=
5
∑
r=0
c2r
and Q=
3
∑
r=0
d2r+1
,
then ‌
P
Q
is equal to
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