Number of apples purchased = A Cost of each apple = 15 cents Then The total cost of 15 apples = 15A Number of bananas purchased = B Cost of each banana = 10 cents Then Cost of 10 bananas = 10B So The total value of purchase = 15A + 10B So the correct option among all the options given in the question is option "D",. I hope the procedure is clear enough for you to understand. Using this procedure it will be possible for you to answer similar questions with ease and without requiring any help from outside.