1. H

    E(X), bag with 6 red and 5 black balls, X = number of red balls

    A bag contains 5 black and 6 red balls. Two counters are drawn, one at a time, and not replaced. Let X be "the number of red counters drawn". Find E(X). ive drawn up a tree diagram which im assuming is correct EDIT: Below is the corrected tree diagram, as eagle eye Dason had spotted a mistake...