madhavamathcompetition.com
More tough combinatorics tutorial for RMO: continued
Practice. Practice. Practice. 1) In how many ways, can a total of 16 be obtained by rolling 4 dice once? 2) Calculate the coefficient of $latex t^{12}$ in $latex (\frac{1-t^{6}}{1-t})^{4}$. 3) Obse…