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14 cards from this deck
1
Probability that something will NOT happen, given it WILL happen
P(doesn’t happen)=1−P(happens)P(\text{doesn't happen}) = 1 - P(\text{happens})P(doesn’t happen)=1−P(happens)
1−16=561 - \frac{1}{6} = \frac{5}{6}1−61=65
Set sum of all probabilities equal to 1, then solve
How many times something is expected to happen over multiple trials
Number of trials × Probability
Theoretical average, not exact; actual results may vary slightly
More trials = closer actual results to expected value
Gives results close to what you'd expect
Gives results significantly different from expectation
Larger sample = more confidence about fairness/bias
Write all probabilities and set sum equal to 1
100×0.5=50100 \times 0.5 = 50100×0.5=50
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