Simple Probability

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 is the formula for calculating the probability of an event?

Back

The probability of an event is calculated as P(E) = Number of favorable outcomes / Total number of possible outcomes.

Front

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

Back

1/6

Front

If a bag contains 3 red, 2 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

2/10 or 1/5

Front

What is the complement of an event in probability?

Back

The complement of an event A, denoted as A', is the event that A does not occur.

Front

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

Back

0.3 (since P(not A) = 1 - P(A))

Front

What is the probability of flipping a fair coin and getting heads?

Back

1/2

Front

How do you calculate the probability of two independent events occurring together?

Back

For two independent events A and B, the probability of both occurring is P(A and B) = P(A) * P(B).

Front

What is the probability of drawing a heart from a standard deck of cards?

Back

1/4 (since there are 13 hearts in a deck of 52 cards).

Front

What is a sample space in probability?

Back

A sample space is the set of all possible outcomes of a probability experiment.