44
P(snapshot camera)= ------
170
48
P(binoculars)= ------
170
8
P(snapshot camera AND binoculars)= ------
170
To find the probability of either A or B (but not both), simply add the individual probabilities of A and B and subtract off the probability of A and B like this:
P(A or B) = P(A)+P(B)-P(A and B)
So in this case:
P(snapshot camera OR binoculars) = P(snapshot camera) + P(binoculars) - P(snapshot camera AND binoculars)
44 48 8 84 42
P(snapshot camera OR binoculars) = ------ + ------ - ----- = ------ = ----
170 170 170 170 85
So the probability of a person having a snapshot camera OR binoculars (but not both) is which means that the answer is c)