Question

if MRP of a cycle is 1100 rs and he give 10% of discount and got 10%
profit then find the CP

Answer 1

If MRP of a cycle is 1100 rs and he give 10% of discount 
selling price=[m.r.p*100-loss%/100]
                   =[1100*90/100]
                   =990 rupees

he still got 10% profit
cp =[s.p*100/100+profit%}
    =[990*100/110]
      =900 rupees