Basic Probability

Front

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

Back

1 (or 100%)

Front

What is the probability of an impossible event?

Back

0 (or 0%)

Front

How do you calculate the probability of a single event?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

Front

What is the probability of spinning green if there are 4 equal sections: red, blue, green, yellow?

Back

1/4

Front

How many outcomes are there for tossing one coin?

Back

2 (Heads or Tails)

Front

What is the probability of rolling an even number on a standard die?

Back

1/2 (There are 3 even numbers: 2, 4, 6 out of 6 total numbers)

Front

If a fair die is rolled 100 times, what is the expected distribution of outcomes?

Back

Each number (1-6) should appear approximately 16-17 times.

Front

What is the probability of getting all answers correct on a 3-question true/false quiz by guessing?

Back

1/8 (There are 2^3 = 8 possible combinations of answers, and only 1 is correct.)

Front

What is a sample space in probability?

Back

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