Probability

If P(A)=P(B), then the two events A and B are _____.

• Independent

• Dependent

• equally likely

• Independent and equally likely

If P(A/B)=P(A), then _____

• A is independent of B

• A is dependent on B

• B is dependent on A

• None of these

If P(A)=0, then the event A ______.

• will never happen

• will always happen

• may happen

• may not happen

If p : q are the odds in favor of an event, then the probability of that event is ____.

• none of these

If A, B and C are mutually exclusive and exhaustive events, then P(A)+P(B)+P(C) equals to _______

• 0

• 1/3

• 1

• any value between 0 and 1

P(A/B') is defined only when _____.

• B is not a sure event

• B is a sure event

• B is an impossible event

• B is not an impossible event

Two balls are drawn from a bag containing 5 white and 7 black balls at random. What is the probability that both are of different colors?

• 12/66

• 30/66

• 35/66

• 1

A, B and C are 3 mutually exclusive and exhaustive events such that P(A)=2P(B)=3P(C). What is P(B)?

• 1/3

• 1/6

• 3/11

• 6/11

If P(A)=1/2, P(B)=1/3, P(AnB)=1/4, what is P(A'/B') ?

• 1/2

• 7/8

• 5/8

• 2/3

If for two events A and B, P(AUB)=1, then A and B are ____ events.

• Mutually exclusive

• Equally likely

• Exhaustive

• Dependent