In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by aLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.
Reema wants to buy a certain designer party dress. The shop is offering a discount of 20% on that dress which is marked at Rs 5000. If Reema was willing to pay even Rs 7000 for that dress, Reema's consumer surplus is