Question

what is probability ? How is it related to wave function ?

Answer 1

a fair chances of occuring of an even is called prodablity

Answer 2

Generally, it is the case when the motion of a particle is described in the position space, where the corresponding probability amplitude function ψ is the wave function. If the function ψ ∈ L2(X), ‖ψ‖ = 1 represents the quantum state vector. ... , that depends on x, forms a probability density function of the given state.