This probability chart shows percentage of success when rolling these combinations. It does not report how many advantage, threat, triumph or depair might be rolled.

A full probability chart can be found here: idoc.pub_star-wars-edge-of-the-empire-dice-roll-probability.pdf

For each pool it shows the average number of results you may get. The first number is when the overall result is a success and the second number is when the overall result is a failure.

For example, when rolling a single boost die you have an average chance of getting 0.5 advantage results when the overall result is a success and 0.7 advantage results when the overall result is a failure. This shows that a boost die gives more advantage when failing and less advantage when succeeding.

• Larger Equal Pools = More Success
  • Equal pools trend towards favoring success when the pools are larger.
  • Example: = 34.0% while = 50.5%

From http://maxmahem.net/wp/star-wars-edge-of-the-empire-die-probabilities/ here is a chart on upgrading pools:

Also from the same website comes the following summaries and formulas:

Upgrading to :

• Has only minimal increases to the success rate (20.83% per die).
• It has an insignificant increase to receiving more (20.83% maximum).
• Adds the ability of rolling (42% chance maximum).

Upgrading to :

• Has a better chance for increased failure than the 'good' die (25% per die).
• Actually decreases odds of rolling threat! (41.66% maximum).
• Same as Triumphs above.

Average Success Rate Formula (0.33B + 0.625A + 0.83P) - (0.33S + 0.50D + 0.75C)

Average Advantage Rate Formula (0.66B + 0.625A + 0.66P) - (0.33S + 0.75D + 0.66C)