The average marks of Ravi in five subjects are 150, but in mathematics 43 was misread as 23 during the calculation. The correct average is:

150 154 148 160

154

Net Increase in marks due to wrong written = 43 - 23 = 20 Increase in average = \(\frac{20}{5}\) = 4 New average = 150 + 4 = 154