Set of value of r for which `C(18,r-2)+2 C(18, r-1)+C(18,r) gt=C(20,13)` contains
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To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW Set of value of r for which `C(18,r-2)+2 C(18, r-1)+C(18,r) gt=C(20,13)` contains
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