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In 2nC3 : ^nC3 = 11 : 1 then n is ….. (a) 5 (b) 6 (c) 11 (d) 1

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In 2nC3 : nC3 = 11 : 1 then n is ….. 

(a) 5 

(b) 6 

(c) 11 

(d) 1

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1 Answer

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Best answer

(b) 6

18 = 3n 

n = 6

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