I came across the following question.
What is the variance of 26 cards (assuming cards values are between 1 and 13)?
The answer for the question involved finding the variance for 1 card and multiplying this by 26. I am well aware that Var(X+Y) = Var(X) + Var(Y) when X, Y independent. However, how come we sum the variance here given that we are not finding the variance of the sum of the 26 cards, but simply the variance of the 26 cards?