Recent content by cohena100

  1. C

    Asking for some help with a probability exercise

    Here is a valid solution: For i = 1, 2, ..., 6 Xi be the random variable that counts the number of times that i came out. Let X be the sum of n dices. X = 1*X1 + 2*X2 + ... + 6*X6 E(Xi) = n/6 E(X) = E(1 * X1 + 2 * X2 + ... + 6 * X6) = 1 * E(X1) + 2 * E(X2) + ... + 6 * E(X6) = 1 * (n/6) + 2 *...