Question

hello could some one help me on this question about probability and sets

Answer 1

I put every thing in the same denominator like
P(A) = 3/5 = 12/20
P(B) = 1/4= 5/20
P(Aor B)= 3/4 = 15/20
Is it ok to you?

Answer 2

Now, find P(A and B) = P(A)+P(B)-P(A or B) = 12/20 +5/20 -15/20 = 2/20

Answer 3

So, the whole thing is 20, and parts of them is shown as this Venn

Answer 4

because P (A) 12/20