A intersection b intersection c formula. We will extend the above ideas to the situation where we have three sets which we will denote a b and c. For simplicity of notation i will adopt the frequently used convention of writing intersection as products. Given three sets a b and c the intersection is the set that contains elements or objects that belong to a b and to c at the same time.
Im having some trouble really understanding this formula when applied to a problem. A 1 2 4 6 b a b 4 c and c a 4. Suppose we draw one card at random.
We write a b c basically we find a b c by looking for all the elements a b and c have in common. As mentioned in a couple of comments you need more information to give a specific numerical value for p a b c. We will not assume anything more than this so there is the possibility that the sets have a non empty intersection.
If this is the case then we can calculate the probability of the intersection of a given b by simply multiplying two other probabilities. It thus makes sense to talk about intersections of multiple sets. If you have 3 events a b and c and you want to calculate the union of both events use this calculator.
The probability of the intersection of two events. Scroll down the page for more examples and solutions on how to shade venn diagrams to represent the required regions of two sets and three sets. Pa cap b pa pb pa cup b the problem im given is this.
These two lines are represented by the equation a1x b1y c1 0 and a2x b2y c2 0 respectively. Point of intersection formula point of intersection formula point of intersection means the point at which two lines intersect. This version of the formula is most useful when we know the conditional probability of a given b as well as the probability of the event b.
Formula for union of 3 sets. Use of formula. Intersection is an associative operation.
This also calculates pa pb pc pa intersection b pa intersection c pb intersection c and pa intersection b intersection c. The intersection of a b c and d for example is unambiguously written a b. 2 n a b c n a b n a c n a b c problems on intersection of three sets.
That is ill write a b as a b etc. Intersection is also commutative. It could be 0 or05 or anything between.
The goal will be to calculate the probability of the union of these three sets or p a u b.