If P(A) + P(B) = 1, does it follow that either event A or event B must occur?
Burhan Tayyab , 13 Years ago
Grade
Algebra> Probablity and statistics...
2 Answers
Mir Noaman Ali IIT-Roorkee
Last Activity: 13 Years ago
NO IT IS NOT NECESSARY
Ritvik Gautam
Last Activity: 13 Years ago
No it does not mean that either or the event must occur.
for exaple... p(a) could be 0.. in that case too... P(a) + P(b) = 1
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