Compare · Probability Calculator
Two independent scenarios side by side.
Scenario A
Probability (independent A, B)
P(A ∩ B)
0.150000
Both events happen
P(A ∪ B)
0.650000
At least one happens
Exactly one
0.500000
A or B but not both
Neither
0.350000
1 − P(A ∪ B)
P(not A) / P(not B)
0.5000 / 0.7000
At least one in 1.5 trials on avg
Scenario B
Probability (independent A, B)
P(A ∩ B)
0.150000
Both events happen
P(A ∪ B)
0.650000
At least one happens
Exactly one
0.500000
A or B but not both
Neither
0.350000
1 − P(A ∪ B)
P(not A) / P(not B)
0.5000 / 0.7000
At least one in 1.5 trials on avg