Probabilit
Grad 11 Note
Calculating probability
What are the chances
The probability of event ‘A’ ;
Sample space
U = sample space
the set of all possible outcomes of an experiment
, Intersection and Union
Overlap and one of the other
The intersection of two events contains all the outcomes that are in both
events - ∩ (and)
The union of two events contains all the outcomes that are either in one event
or the other - ⋃ (or)
Eg;
- n(maths ∩ spanish) = 5 + 15
- n(maths ∩ spanish) = 20
Eg ;
- n(maths ⋃ spanish) = 17 + 5
- n(maths ⋃ spanish) = 22
Grad 11 Note
Calculating probability
What are the chances
The probability of event ‘A’ ;
Sample space
U = sample space
the set of all possible outcomes of an experiment
, Intersection and Union
Overlap and one of the other
The intersection of two events contains all the outcomes that are in both
events - ∩ (and)
The union of two events contains all the outcomes that are either in one event
or the other - ⋃ (or)
Eg;
- n(maths ∩ spanish) = 5 + 15
- n(maths ∩ spanish) = 20
Eg ;
- n(maths ⋃ spanish) = 17 + 5
- n(maths ⋃ spanish) = 22
