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in Class XI Maths by (-2,838 points)

If the integers r > 1, n > 2 and coefficients of (3r)th and (r + 2)nd terms in the binomial expansion of (1 + x)2n are equal, then
(a) n = 2r              
(b) n = 3r             
(c) n = 2r + 1        
(d) none of these 

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If the integers r > 1, n > 2 and coefficients of (3r)th and (r + 2)nd terms in the binomial expansion of (1 + x)2n are equal, then 

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