Question

If A and B are dependent events, which of these conditions must be true?
P(A and B) = P(A) + P(B)

P(A and B) = P(B)
P(A)

P(B|A) = P(B)
P(A|B) = P(A)
P(B|A) P(B)

Answer 1

one sec

Answer 2

ok

Answer 3

If A and B are dependent events,
and A occurs first,
P(A and B) = P(A) • P(B,once A has occurred)
... and is written as ...
P(A and B) = P(A) • P(B|A)

P(B|A): Probability of B, when A has happened


if they are INdependent, that means it doesn't matter which on is first, or if there even will be an "A" .

A. P(B|A) = y
B. P(A|B) = y
C. P(B|A) = x

let's examine what the options would translate into

A. P(B|A) = y
Probability of B, (when A has happened),
is y
"the probability of event B is y"

yeah, that one would work :)

B. P(A|B) = y

A is y
WRONG
C. P(B|A) = x

B is x
WRONG

Answer 4

Does this help?

Answer 5

think u

Answer 6

Np :)