Content deleted Content added
Line 24:
The probabilities associated with all (hypothetical) values must be non-negative and sum up to 1,
:<math>\sum_x p_X(x) = 1\quad</math> and <math>\quad p_X(x)\geq 0</math>.
Thinking of probability as mass helps to avoid mistakes since the physical mass is conserved as is the total probability for all hypothetical outcomes <math>x</math>.
| |||