The Department of Statistics of the University of Calcutta was established in 1941 with Prof. P.C. Mahalanobis as the founder Head. It is the oldest Department in Asia that offers a post-graduate course in Statistics. It has nurtured and produced several eminent statisticians who have received worldwide recognition. The department is regularly visited by illustrious scholars, both from India and abroad. Over the years, it has established itself as one of the prime departments in India for disseminating knowledge in Statistics and related disciplines. Calcutta Statistical Association is an international learned society, closely associated with the Department. It was established in 1945 with a view to promoting activities related to Statistics and its allied fields. The Association publishes an internationally circulated journal, besides organizing lectures, seminars, workshops and symposia. Currently, the journal is being published by SAGE. It also keeps a close liaison with the academic activities of the Department of Statistics in universities, colleges, Colleges and other institutes in West Bengal. SYMPOSIUM Following in the footsteps of the earlier nine symposia, held in 1991, 1994, 1997, 2000, 2003, 2006, 2009, 2012, 2015 and 2018, the Eleventh International Triennial Calcutta Symposium will offer a common platform to statisticians engaged in research on theoretical and applied aspects of Statistics and Probability, to interact and exchange ideas. A fairly large number of eminent researchers from all over the world are expected to attend the Symposium. Highlights: R. C. Bose Memorial Session on Design of Experiments and Related Combinatorics S. N. Roy Memorial Lecture organized by the Department of Statistics, University of Calcutta S. K. Chakravarti Memorial Lecture organized by the Calcutta Statistical Association. Poster session for students and young researchers. LANGUAGE The official language of the Symposium will be English.