The incomes of Abhinav and Bishnu are in the ratio 4:3,

Solution

ATQ,

Let the incomes of 'Abhinav' and 'Bishnu' be Rs. '4p' and Rs. '3p', respectively. ATQ; {(4p - 5000)/(3p - 5000)} = (3/1) 4p - 5000 = 9p - 15000 Or, 10000 = 5p So, p = 2000 So, average incomes of 'Abhinav' and 'Bishnu' = {(4p + 3p)/2} = 3.5p = 3.5 × 2000 = Rs. 7,000 Savings of 'Abhinav' = 4p - 5000 = Rs. 3,000 Savings of 'Bishnu' = 3p - 5000 = Rs. 1,000 So, their average savings = {(3000 + 1000)/2} = Rs. 2,000 Required difference = 7000 - 2000 = Rs. 5,000