The Supreme Court today told CBI to inform in three weeks about taking over investigation of maximum number of cases out of 185 arising from Madhya Pradesh's Vyapam scam. The apex court also asked the Department of Personnel and Training to inform by next date of hearing on August 7 about filling of necessary vacancies in the CBI as the agency has complained that shortage of man power was coming in the way of probe. <br/><br/>A bench comprising Chief Justice H L Dattu, Justices Arun Mishra and Amitava Roy also said that CBI should be in a position to complete the task of appointing lawyers to prosecute the cases in various special CBI courts in Madhya Pradesh within six weeks. <br/>At the outset, the Solicitor General said that there are all together 185 cases and charge sheets have been filed in 78 of them and the priority of the CBI is to take over those cases in which the investigation was undergoing. He said that 55 cases are being examined by the STF/SIT and out of the remaining 130 cases, charge sheets have been filed in 49 and out of 81 which are under probe, 73 are related to cheating by candidates in examination which the CBI was preferring to take up at a later stage. He said preliminary inquiry was being carried out in one death case and in another regular case has been registered.