Probability Distributions (Edexcel A-Level Mathematics): Flashcards

It can take specific, distinct values at random.

The outcomes of rolling a fair die.

Probabilities associated with each outcome.

$P(X = x) = 1/6$ for $x = 1, 2, 3, 4, 5, 6$.

All probabilities must sum to $1$.

Set the sum of probabilities equal to $1$.

The probability that $X$ takes values greater than 3.

Add $P(X=4)$ and $P(X=5)$.

The probability that two sampled values are equal.

Find combinations of values that add to $5$.