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The average marks of 40 students in an English exam is 72. Later it is found that three marks 64, 62 and 84 were wrongly entered as 68, 65 and 73. The average after mistakes were rectified is अंग्रेजी के परीक्षा में 40 छात्रों का औसत अंक 72 है। बाद में पता चला है कि तीन अंक 64, 62 और 84 गलती से 68, 65 और 73 लिख दिए गए थे। गलतियाँ सुधारने के बाद औसत है-