Mathematics: Me! 2. what must be true in order for p (a or b) = p(a) + p (b)? (1 point) a.a and b cannot be disjoint. b.a and b must be independent. c.a and b cannot be independent. d.a and b must be disjoint. e.it is always true. 3. what must be true for p (a and b) = p (a) • p (b)? (1 point) a.a and b cannot be independent. b.a and b must be disjoint. c.a and b must be independent. d.a and b cannot be disjoint. e.it is always true.

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Me! 2. what must be true in order for p (a or b)

angelinaviera09

15.03.2022

(2)

we are given

P(A or B)=P(A)+P(B)

we know formula is

P(A or B) = P(A)+P(B)-P(A∩B)

now, if A and B are disjoint

so,

P(A∩B) =0

now, we can plug it

P(A or B) = P(A)+P(B)-0

P(A or B) = P(A)+P(B)

so, option-DAnswer

(3)

P (A and B) = P (A) • P (B)

we know that

If A and B are independent events

then

P (A and B) = P (A) • P (B)

so, option-CAnswer

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