A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?
Pick:  A) 5 : 6  B) 3 : 4  C) 7 : 8  D) 8 : 9  E) None of these
25 = E/(1000 - E) * 100   1000 - E = 4E   1000 = 5E =&gt; E = 200   ANSWER:7 : 8
<result>C</result>
A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?