Bulletin of Pure and Applied Sciences Section-E-Math. & Stat. is devoted to the international advancement of organized knowledge on all aspects of Mathematics and Statistics. It is serving as a forum to publish refereed, well-written original research articles and studies that describe the latest research and developments in the area of mathematics and statistics. Scope of the journal includes: Finance, economics, mathematics, statistics and probability, theoretical developments and techniques. It provides a forum for comments by publishing original research contributions, scientific survey, case studies, book review and letter to the Editor-in-Chief. Bulletin of Pure and Applied Sciences Section-E-Math. & Stat. is issued six monthly, i.e. June and December of every year. The Editor-in-Chief/Managing Editor/Editorial Board etc. assumes no responsibility for the statements and opinions advanced by the contributors. The editorial staff in its work of examining papers, received for possible publication is assisted, in an honorary capacity, by a large number of distinguished scientists working in various parts of the world. Bulletin of Pure and Applied Sciences Section-E-Math. & Stat. is copy-righted. Manuscripts published in the Bulletin should not be reproduced without the written permission of the Editor-in-Chief.