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CBSE Class 11-science Answered

a bag contains 3 red and 2 black balls and another bag contains 2 red and 3 black balls.what is the probality of choosing a black ball from randomly chosen bag
Asked by me.deepak45 | 04 Mar, 2015, 06:18: PM
answered-by-expert Expert Answer

P r o b a b i l i t y space o f space c h o o sin g space a space b a g space left parenthesis a n y space 1 space o u t space o f space 2 right parenthesis space equals space 1 half P r o b a b i l i t y space o f space c h o o sin g space b l a c k space b a l l space f r o m space b a g space 1 space equals space fraction numerator 2 over denominator 2 plus 3 end fraction equals 2 over 5 P r o b a b i l i t y space o f space c h o o sin g space b l a c k space b a l l space f r o m space b a g space 2 space equals space fraction numerator 3 over denominator 3 plus 2 end fraction equals space 3 over 5 s o comma space p r o b a b i l i t y space o f space c h o o sin g space a space b l a c k space b a l l space f r o m space r a n d o m l y space c h o s e n space b a g equals space P r o b a b i l i t y space o f space c h o o sin g space b l a c k space b a l l space f r o m space b a g space 1 plus space P r o b a b i l i t y space o f space c h o o sin g space b l a c k space b a l l space f r o m space b a g space 2 space equals 1 half cross times 2 over 5 plus 1 half 3 over 5 equals 5 over 10 equals 1 half

Answered by | 04 Mar, 2015, 06:27: PM

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