Probability Revision

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 rolling a number less than 1 on a regular 6-sided die?

Back

0

Front

What is the formula for calculating the probability of an event?

Back

P(A) = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}

Front

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

Back

\frac{1}{2} (There are 26 black cards out of 52 total cards.)

Front

What does P(not A) represent?

Back

P(not A) represents the probability that event A does not occur.

Front

If P(A) = \frac{1}{4}, what is P(not A)?

Back

P(not A) = 1 - P(A) = 1 - \frac{1}{4} = \frac{3}{4}.

Front

What is the probability of spinning green on a spinner with 3 green sections out of 10 total sections?

Back

\frac{3}{10}.

Front

How do you simplify the fraction \frac{6}{8}?

Back

\frac{6}{8} = \frac{3}{4}.

Front

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

Back

1 (or 100%).

Front

What is the probability of an event that is impossible?

Back

0.