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In what ratio must a grocer mix two varieties of tea worth Tk.60 per kg and Tk.80 per kg that by selling the mixture at Tk.68.20per kg he may gain 10%?

In what ratio must a grocer mix two varieties of tea worth Tk.60 per kg and Tk.80 per kg that by selling the mixture at Tk.68.20per kg he may gain 10%? Correct Answer 3:2

***The question is erroneous... Let the mixture be made up of x kg tea of worth TK 60 per kg and y kg tea of worth TK. 80 per kg. Total cost price = 60x + 80y Total selling price = 68.2(x + y) Now, {68.2(x + y) - (60x + 80y)} / (60x + 80y) = 10/100 or,  (68.2x + 68.2y - 60x - 80y) / (60x + 80y) = 1/10 or,  (8.2x - 11.8y) / (60x + 80y) = 1/10 or,  82x - 118y = 60x + 80y or,  82x - 60x = 80y + 118y or,  22x = 198y or,  x / y = 198 / 22 or, x / y = 9 / 1 So, x : y = 9 : 1

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A grocer wants to gain 10% by selling the mixture of tea at Rs. 68.20 a kg, If he has tea of worth Rs. 60 a kg and Rs. 65 a kg , in what ratio the grocer must mix them?
In what ratio must a grocer mix two varieties of tea worth Tk 60 per kg and 65 per kg so that by selling the mixture at Tk 68.20 per kg he may gain 10%?
In what ratio must a grocer mix two varieties of tea Worth Tk. 60 per kg and Tk. 65 per kg so that by selling the mixture at Tk. 68.20 per kg he may gain 10% ?
In what ratio must a grocer mix two varieties of tea worth TK. 60 a kg and TK. 65 a kg so that by selling the mixture at TK. 68.20 a kg he may gain 10% ?
In what ratio must a grocer mix two varieties of tea worth Tk. 60 a kg and Tk. 65 a kg so that by selling the mixture at Tk. 68.20 a kg he may gain 10%?
In what ratio must a grocer mix two varieties of tea worth Rs. 60 a kg and Rs. 65 a kg, so that by selling the mixture at Rs. 71.3 a kg he may gain 15%?
In what ratio must a grocer mix two varieties of tea worth Rs. 60 a kg and Rs. 65 a kg so that by selling the mixture at Rs. 68.20 a kg he may gain 10%?