IBPS/SBI PO BANKING STUDY MATERIAL ON AVERAGE SHORT CUT METHODS
QUANTITATIVE APTITUDE (AVERAGE) SHORTCUT METHOD Rule 1: If different distance is travelled in different time then AV. SPEED= TOTAL DISTANCE COVERED / TOTAL TIME TAKE Rule 2: If equal distance is travelled at different speed. If equal distance is travelled at the speed of A and B then, AV. SPEED= (2AB) / (A+B) Rule 3: If equal distance is travelled at the speed of A, B and C then, AV. SPEED= (3ABC) / (A+B+C) When a person leaves the group and another person joins the group in place of that person then, Rule 1: If the average age is increased, Age of new person = Age of separated person + (Increase in average × total number of persons) Rule 2: If the average age is decreased, Age of new person = Age of separated person - (Decrease in average × total number of persons) Rule 3: New average age of group = {(PRE. AV. * NO OF PERSONS) - AGE OF LIVING PERSON + AGE OF JOINING PERSON} / NO. OF PERSONS When a person joines the group. Rule 1:...