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
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2
Let the cost of type I and II cakes = Rs. x and y
Now, 3x + 6y = 900
x + 2y = 300 .....(1)
Also,
3 × 15x/100 - 6 × 10y/100 = 300
3x - 4y = 200 .....(II)
Solving both
x = 160 & y = 70