Mr. Kamal Nain Kapoor is working as Associate Professor in the department of Statistics at Hindu College, University of Delhi, since 1955. He passed out his M.Sc and M.Phil from department of Statistics in 1993 and was awarded Dr. K.S. Krishnan research fellowship from NBHM, Department of Atomic Energy, BARC Mumbai in 1992 and in 1994 he was awarded JRF from CSIR-UGC (NET). He is also visiting faculty at the Department of Statistics and Department of Mathematics, University of Delhi in academic year 2010-2011. Author has been teaching in the department of Statistics Hindu College, Delhi for over 15 years. During all these years, he has taught several courses in mathematics and statistics to undergraduates and postgraduates at the college and at the north campus of Delhi University. His main interests are in the fields of Probability Theory, Statistical Method, Linear Algebra and Real Analysis.