Question Number 66497 by ketto2 last updated on 16/Aug/19
Answered by MJS last updated on 16/Aug/19
$$\mathrm{all}\:\mathrm{the}\:\mathrm{money}\:=\mathrm{1} \\ $$$$\mathrm{1}−\frac{\mathrm{5}}{\mathrm{11}}−\frac{\mathrm{7}}{\mathrm{12}}×\left(\mathrm{1}−\frac{\mathrm{5}}{\mathrm{11}}\right)=\frac{\mathrm{6}}{\mathrm{11}}−\frac{\mathrm{7}}{\mathrm{12}}×\frac{\mathrm{6}}{\mathrm{11}}=\frac{\mathrm{6}}{\mathrm{11}}−\frac{\mathrm{7}}{\mathrm{22}}=\frac{\mathrm{5}}{\mathrm{22}} \\ $$