Question

10 indistinguishable pigeons can be arranged in 2
distiguishable holes in
distinguishable ways.​

Answer 1

Columbidae is a bird family consisting of pigeons and doves. It is the only family in the order Columbiformes. These are stout-bodied birds with short necks, and short slender bills that in some species feature fleshy ceres. They primarily feed on seeds, fruits, and plants.