RRB Group-D Model Paper 13 with answers for online practice

Given:
The selling price of 20 articles = cost price of 25 articles
Concept used:
Profit % = (SP - CP)/CP × 100
Calculation:
Let the Cost Price (CP) of each article be x
CP of 25 articles = 25x
Selling price (SP) of 20 articles = 25x
Selling price of an article = 25x/20 = 5x/4
Profit = SP – CP = 5x/4 – x = x/4
Profit% = (x/4) /x × 100 = 25%
∴ The profit % obtained by the shopkeeper is 25%.