Question

Please helpA⊆B meaning and how to solve:Suppose Pr(A)=0.28, Pr(B)=0.45 and A⊆B. Find:a- Pr(A∩B)b -Pr(A∪B)

Answer 1

To understand A subset B we will draw a figure

That means A is inside be

Then the intersection between A and B should happen in A

Since P(A) = 0.28

Since p(B) = 0.45

Then

`P(A\cap B)=P(A)=0.28`

To find A union B we will add A and B but since A is inside B, then we will not repeat it, then it should be B

`P(A\cup B)=P(B)=0.45`