8. In a certain laboratory we find the following chemicals:

C only 300

H only 500

Both 200

Total 1000

P(C) = 300/1000=.3

P(H)= 500/1000=.5

P(B)= 200/1000=.2

Now findP(C or H)=P(.3)+P(.5)-P(.2)=.6

P(C only or H only) =0 Because Not Mutually Exclusive

Am i correct in answering the last two in bold?

Im going by my teachers notes that state that P(A or B)=P(A)+P(B)-P(A and B)

And then then last one are they mutually Exclusive