Answer Answer: 6 Explanation: Let, the amount of coffee A = X pound and, the amount of coffee B = 10-X pound So, the cost of coffee A = 100X Cost of coffee B =(10-X)70 Total cost: 100x + 70 (10-x) = 88 *10 ⇒ 100x +700 - 70x = 880 ⇒ 30x =880-700 ⇒ 30x = 180 ∴ X = 180/30 =6 Answer: 6