Mock tests for Tamil Nadu Public Service Commission Preliminary Examination. The section comprises specific questions from General Studies, Science, Mathematics, History, Polity and Geography as well as Current Affairs of National Importance. It also includes detailed solutions and analysis at the end of the practice test.
This thread is created to discuss all kind of queries related to the preparation of quantitative aptitude for TNPSC.
The mean and standard deviation of 10 observations are 45 and 3, respectively. If each observation is increased by 4, the respective changed mean and standard deviation will be