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Question Number 182620 by cortano1 last updated on 12/Dec/22
Answered by Acem last updated on 12/Dec/22
$$\:{P}\:\left(\mathrm{1}{st}\:{is}\:{white},\:{B}_{{A}} \right)=\:\frac{\frac{\mathrm{3}}{\mathrm{5}}\:×\:\frac{\mathrm{3}}{\mathrm{5}}}{\frac{\mathrm{3}}{\mathrm{5}}\:×\:\frac{\mathrm{3}}{\mathrm{5}}\:+\:\frac{\mathrm{3}}{\mathrm{50}}\:+\:\frac{\mathrm{3}}{\mathrm{100}}\:+\:\frac{\mathrm{1}}{\mathrm{100}}}\:=\:\frac{\mathrm{18}}{\mathrm{23}} \\ $$