Mathematics for Machine Learning, Marc Peter Deisenroth, A. Aldo Faisal, and Cheng Soon Ong, 2020 (Cambridge University Press)DOI: 10.1017/9781108679904 - Covers fundamental mathematical concepts for machine learning, including probability distributions like the exponential distribution, explained in a context relevant to ML practitioners.
Introduction to Probability and Statistics (Course 6.041SC), John Tsitsiklis, 2010 (MIT OpenCourseWare) - Official course materials from MIT OpenCourseWare, providing foundational lectures and notes on probability distributions, including the exponential distribution, from an engineering and applied science perspective.