What must be true in order for p (a or b) - p(a) + p(b)? a. a and b cannot be disjoint. b. a and b must be independent. c. a and b cannot be independent. d. a and b must be disjoint. e. it is always true.

it is probably the graph on the bottom right.

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )