For a random experiment

MATHEMATICS · Single correct · GCSE · Mathematics · Probability · Probability

Problem

For a random experiment, events

A

and

B

satisfy

P(A)=0.4

P(B)=0.3

and

P(A\cup B)=0.7

. Which of the following must be true about

A

and

B

? (a)

A

and

B

are independent. (b)

A

and

B

are mutually exclusive. (c)

A

and

B

are complementary. (d)

A

and

B

are equally likely.