The teachers’ library›Probability and statisticsBinomial theorem(a+b)n=k=0∑n(nk)an−kbk(a+b)n=∑k=0n(nk)an−kbkOpen on a new board The board is kept in this browser only, like your other boards. On any board, the Library button adds this too.More in Probability and statisticsPermutations and combinationsProbability of an eventAddition and multiplication rulesBinomial distributionExpected value and varianceMean, standard deviation and z-score