Rahim bought 4 dozen apples at Tk.12 per dozen and 2 dozen apples at Tk.16 per dozen. He sold all of them to earn 20%. At wha...

Rahim bought 4 dozen apples at Tk.12 per dozen and 2 dozen apples at Tk.16 per dozen. He sold all of them to earn 20%. At what price per dozen did he sell the apples?