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    Question

    A man buys 3 type-I cakes and 6 type-II cakes for Rs.

    900. He sells type-I cakes at a profit of 15% and type-II cakes at a loss of 10%. If his overall profit is Rs. 30, the cost price (in Rs.) of a type-I and a type-II cake is:
    A 100, 100 Correct Answer Incorrect Answer
    B 160, 70 Correct Answer Incorrect Answer
    C 180, 60 Correct Answer Incorrect Answer
    D 120, 90 Correct Answer Incorrect Answer

    Solution

    ATQ, Total profit = 30 Average profit = 30/900 ├Ч 100 = 10/3% Using allegation Method 15┬а ┬а ┬а-┬а ┬а ┬а10 ┬а ┬а ┬а 10/3 40/3┬а ┬а ┬а ┬а35/3 Ratio of type-1 cakes to type-2 cakes = 40/3 : 35/3 = 8 : 7 тЗТ 8 + 7 = 15 unit тЗТ 15 unit = 900 тЗТ 1 unit = 60 тЗТ 8 unit = 480 тЗТ 7 unit = 420 Total cost of type-1, 3 cakes = 480 Cost of type-1, 1 cake = 480/3 = 160 Total cost of type-2, 6 cakes = 420 Cost of type-2, 1 cake = 420/6 = 70

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