PDF[HypergeometricDistribution[n,ns,nt],k]

nt=5; ns=3;n=2;k=2

Binomial[5,3]

N[Table[PDF[BinomialDistribution[10,1/3],k],
{k,0,12}],2]

ListPlot[Table[PDF[BinomialDistribution[10,1/3],k],
{k,0,12}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[10,1/2],k],
{k,0,12}],Filling->Axis]

N[Table[PDF[BinomialDistribution[10,1/2],k],
{k,0,12}],2]

ListPlot[Table[PDF[BinomialDistribution[10,2/3],k],
{k,0,12}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[5,1/2],k],
{k,0,20}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[10,1/2],k],
{k,0,20}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[15,1/2],k],
{k,0,20}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[20,1/2],k],
{k,0,20}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[25,1/2],k],
{k,0,35}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[35,1/2],k],
{k,0,35}],Filling->Axis]

ListPlot[Table[PDF[BinomialDistribution[45,1/2],k],
{k,0,35}],Filling->Axis]

ListPlot[Table[PDF[NegativeBinomialDistribution[5,1/3],k],{k,0,25}],Filling->Axis]

Plot[PDF[FRatioDistribution[5,15],x],{x,0,5}]

Plot[{PDF[FRatioDistribution[5,15],x],PDF[FRatioDistribution[7,20],x],
PDF[FRatioDistribution[10,25],x]},{x,0,6}]

Plot[{PDF[ExponentialDistribution[1],x],
PDF[ExponentialDistribution[2],x],
PDF[ExponentialDistribution[5],x]},{x,0,5}]

Plot[{PDF[GammaDistribution[2,5],x],
PDF[GammaDistribution[1/2,5],x],
PDF[GammaDistribution[2,1/5],x]},{x,0,25}]

Plot[{PDF[ChiSquareDistribution[1],x],
PDF[ChiSquareDistribution[3],x],
PDF[ChiSquareDistribution[5],x]},{x,0,20}]

Plot[{PDF[NormalDistribution[0,2],x],
PDF[NormalDistribution[-1,3],x],
PDF[NormalDistribution[2,5],x]},{x,-10,10}]