A shopkeeper mixes two varieties of tea. One costing Tk.35 per kg and another at Tk.45 per kg in the ratio 3 : 2. If he sells...

A shopkeeper mixes two varieties of tea. One costing Tk.35 per kg and another at Tk.45 per kg in the ratio 3 : 2. If he sells the mixed variety at 41.60 per kg, his gain or loss percent is---