Sagot :
[tex]1)\\A-the\ first\ marble\ is\ red\ and\ the\ second\ marble\ is\ green\\\\P(A)=\frac{5}{8}\cdot\frac{3}{7}=\frac{15}{56}\\\\2)\\B-goth\ marbles\ are\ red\\\\P(B)=\frac{5}{8}\cdot\frac{4}{7}=\frac{5}{2}\cdot\frac{1}{7}=\frac{5}{14}\\\\3)\\C-both\ marbles\ are\ the\ same\ color\\\\P(C)=\frac{5}{8}\cdot\frac{4}{7}+\frac{3}{8}\cdot\frac{2}{7}=\frac{20}{56}+\frac{6}{56}=\frac{26}{56}=\frac{13}{28}[/tex]