you are told that p(a|b) = p(b|a). which statement below must be true

By definition of conditional probability,

Since , we have

so that either

which means the events A and B are disjoint, or

which means A and B are equally likely to occur.

10 - 75

step-by-step explanation:

there's nothing attached so it's most likely anything in that range.

the ratios are reciprocals im positive

step-by-step explanation:

they are all positive numbers so it wouldn't be the other ones