/usr/include/Bpp/Numeric/Prob/ is in libbpp-core-dev 2.2.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Bpp/Numeric/Prob/AbstractDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/BetaDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/ConstantDistribution.h
/usr/include/Bpp/Numeric/Prob/DirichletDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/DiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/ExponentialDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/GammaDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/GaussianDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/InvariantMixedDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/MixtureOfDiscreteDistributions.h
/usr/include/Bpp/Numeric/Prob/MultipleDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/SimpleDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/Simplex.h
/usr/include/Bpp/Numeric/Prob/TruncatedExponentialDiscreteDistribution.h
/usr/include/Bpp/Numeric/Prob/UniformDiscreteDistribution.h