The currency was recovered by Indore police's crime branch team after it arrested Sanjay Gupta recently from Jabalpur in connection with the scam, police sources said.
Besides Gupta, sleuths earlier arrested alleged kingpins of the gang, Jagdish Sagar and three officials of the Madhya Pradesh Professional Examination Board (MPPEB) which organises tests for various professional courses and government jobs in the state.
After getting information from Gupta, the police raided his house in Jagdamba Colony and recovered Rs 51 lakh cash from there.
