Binomial Theorem Part 1

Section: Mathematics
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Question : 61 of 100
 
Marks: +1, -0
20
Σ
i=1
(
20
‌
Ci−1
20
‌
Ci
+
20
‌
Ci−1
)
3
=
k
21
, then k equals :
[10 Jan 2019 Shift 1]
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