Let-a-b-c-be-no-null-integers-A-ballot-box-contains-a-black-bowls-and-b-white-bowls-After-a-print-we-put-the-bowl-back-in-the-ballot-box-with-c-another-bowls-of-the-same-color-Prove-that-th

Question Number 131509 by snipers237 last updated on 05/Feb/21

L e t a, b, c b e n o n u l l i n t e g e r s . A b a l l o t b o x c o n t a i n s “ a^{″} b l a c k b o w l s a n d “ b^{″} w h i t e b o w l s .

A f t e r a p r i n t w e p u t t h e b o w l b a c k i n t h e b a l l o t b o x w i t h “ c^{″} a n o t h e r b o w l s o f t h e s a m e c o l o r .

P r o v e t h a t t h e p r o b a b i l i t y t o e x t r a c t a g r e e n b o w l a t a n y p r i n t i s a l w a y s

p = \frac{a}{a + b}