Correct Answer - Option 2 : Rs.600
The average expenditure of the group after Gauri joined them is Rs.5000
∴ Total expenditure of the group = 5000 × 4 = 20,000
Amount spent be Gauri = Rs.3600
∴ Total expenditure of Saksham, Megha and Jay = 20000 – 3600 = 16400
The ratio of expenditure of Saksham, Megha and Jay = 25 ∶ 29 ∶ 28
⇒ Let there expenditure be 25x, 29x and 28x
∴ 25x + 29x + 28x = 16400
⇒ 82x = 16400
⇒ x = 200
∴ Difference between the amount spent by Saksham and Jay = (28 × 200) – (25x × 200) = 3 × 200 = 600
∴ The difference between the amount spent by Saksham and Jay is Rs.600