Learned about cross validation today from the book “Elements of statistical learning” and also read a little from the book “All of Statistics” . Also watched a video https://www.khanacademy.org/math/precalculus/x9e81a4f98389efdf:prob-comb/x9e81a4f98389efdf:prob-combinatorics-precalc/v/generalizing-with-binomial-coefficients-bit-advanced from Kahn Academy regarding probabilities, it is a really good site for learning! Finally learned about K-means clustering from Udemy course, it is now 50% complete!