The greatest term (Numerically) in the expansion of (3x+2y)15 when x=12 , y=13

The greatest term (Numerically) in the expansion of (3x+2y)15 when x=12 ,  Here​  n=15;X=2y3x=23.1312∵x=12,y=13                                                                     = 23.23=49 Now (n+1)|X||X|+1=(15+1)×4949+1=16·49139=6413=4.92=4+0.92=p+F∴ Numerically greatest term is Tp+1=T55th  term