Basic Concept of Probability

Which of the following best describes 'Probability'?

• A measure of the likelihood of an event occurring.

• A calculation of the total number of events.

• A way to measure the speed of an event.

• A method for predicting future trends.

If two events are mutually exclusive, what is true about them?

• The two events can occur at the same time.

• The two events are independent of each other.

• The two events cannot occur simultaneously.

• One event must happen if the other does not.

What is the probability of rolling a 3 on a fair six-sided die?

• 1/2

• 1/4

• 1/6

• 2/6

In a standard deck of cards, what is the probability of drawing a heart?

• 1/2

• 1/4

• 1/3

• 1/5

What does it mean if an event has a probability of 0?

• The event has a 50% chance of occurring.

• The event is highly likely to happen.

• The event will happen eventually.

• The event cannot happen.

What is the sum of probabilities of all possible outcomes of a random experiment?

• 0.5

• 2

• 1.5

• 1

If the probability of event A is 0.7, what is the probability of event A not occurring?

• 0.1

• 0.3

• 0.5

• 0.9

Which of the following is an example of independent events?

• Rolling two dice and adding the results

• Drawing a card from a deck and flipping a coin

• Choosing a number and spinning a roulette wheel

• Flipping a coin and rolling a die

What is the term for the likelihood of an event occurring based on past data?

• Probability

• Forecasting

• Chance

• Risk Assessment

In probability, what does 'P(A and B)' represent?

• The probability of both events A and B occurring.

• The probability of either event A or B occurring.

• The probability of event A occurring only.

• The probability of event B occurring only.