Given: Price of [4 shirts + 7 jeans] = 6900 Price of [6 shirts + 11 jeans] = 6900 + 3900 Calculation: Let the cost of one shirt and one jeans be ‘x’ and ‘y’ respectively According to the question 4x + 7y = 6,900 ------(1) According to the second condition, 6x + 11y = 6,900 + 3,900 ⇒ 6x + 11y = 10,800 ------ (2) Solving equations (1) and (2) simultaneously we get, ⇒ x = 150 and y = 900 ∴ The cost of one jeans is Rs. 900