Question

A person named 'X' purchased a mobile phone and a headphone. He sells the mobile phone at a 20% profit and the headphone at a 10% profit. However, if he were to sell the mobile phone at a 25% profit and the headphone at a 20% profit instead, his total profit would increase by ₹550. What is the ratio of the cost price of the mobile phone to that of the headphone?

A 5:3
B 1:4
C 7:5
D Cannot be determined
E None of these
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