A and B are mutually exclusive events. PA) = 0.50 and P(B) = 0.30. What is
PA or B)?

P(A∪B)=0.8

Explanation:

Given that,

A and B are mutually exclusive events such that,

P(A)=0.5 and P(B)=0.3

We need to find P(A or B). It means we need to find P(A∪B). If two events are mutually exclusive, P(A∩B)=0. So,

P(A∪B)=P(A)+P(B)-P(A∩B)

Putting P(A) and P(B), we get :

P(A∪B)=0.5+0.3-0

P(A∪B)=0.8

So, the value of P(A or B) is 0.8

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank