Statistics

Front

What is the definition of probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What does A ∪ B represent in probability?

Back

A ∪ B represents the union of events A and B, meaning it includes all outcomes that are in A, in B, or in both.

Front

What does A ∩ B represent in probability?

Back

A ∩ B represents the intersection of events A and B, meaning it includes all outcomes that are in both A and B.

Front

What is the formula for calculating the probability of the union of two events?

Back

P(A ∪ B) = P(A) + P(B) - P(A ∩ B) where P(A) and P(B) are the probabilities of events A and B, respectively.

Front

What is the probability of an event that is certain to happen?

Back

The probability of an event that is certain to happen is 1.

Front

What is the probability of an impossible event?

Back

The probability of an impossible event is 0.

Front

If a bag contains 6 red marbles, 5 green marbles, and 4 yellow marbles, what is the total number of marbles?

Back

The total number of marbles is 15.

Front

What is the probability of picking a red marble from a bag of 15 marbles with 6 red marbles?

Back

The probability is 6/15 or 2/5.

Front

What is the probability of choosing a puppy or a parakeet from a pet store with 6 puppies and 7 parakeets?

Back

The probability is 13/17.

Front

What does 'without replacement' mean in probability?

Back

'Without replacement' means that once an item is selected, it is not put back into the pool for subsequent selections.