In a probability assignment P(a) = 0.1, P(b) = 0.2, P(c) = 0.4, P(d) = 0.3, P({a,d}) =

Question

a. 0.2

b. 0.3

c. 0.4

d. 0.5

Answer 1

Probabilities are

P(a) = 0.1

P(d) = 0.3

Then P({a,d}),

We know that P({a,d}) = P(a) + P(b)

P({a,d}) = 0.1 + 0.3

P({a,d}) = 0.4

Therefore P({a,d}) is 0.4

Option (c) is the correct answer.