On some distributions involving general functions

In this note, two aspects in relation to distribution involving general functions are considered. Firstly, the distribution of the sum and also the ratio of two independent radom variables with densities including  ∅₂ (a₁,.... a_n; S; λ₁ x, .. , λ_n x) and ψ₂ (p ; b₁ ^..., b_n ; t₁ u .... t_n y) is dealt with. The speciol case of n=2  is considered.  Also, the distribution oI the sum of variables with ∅₂ and ∅₃ as their densities is obtained. The second aspect is estimation. In ∅₂ , a parameter is estimated and the estimate is put in the closed form in terms of the general function ψ₂. Also, the Bayes estimate in the distribution involving the Bessel function I_p(cx) is obtained and is expressed in terms of another general function F_A.