Simple Probability and Complements

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

Front

What does it mean if the probability of an event is 0?

Back

If the probability of an event is 0, it means that the event cannot occur.

Front

What does it mean if the probability of an event is 1?

Back

If the probability of an event is 1, it means that the event is certain to occur.

Front

What is the complement of an event?

Back

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

Front

How do you calculate the probability of the complement of an event?

Back

The probability of the complement of an event A is calculated as P(A') = 1 - P(A).

Front

If a spinner has 7 equal sections, what is the probability of landing on one specific color?

Back

The probability of landing on one specific color is P(color) = \frac{1}{7}.

Front

If a spinner has 7 equal sections and 4 are blue or yellow, what is the probability of landing on blue or yellow?

Back

The probability of landing on blue or yellow is P(blue or yellow) = \frac{4}{7}.

Front

What is the probability of landing on an even number if a spinner has numbers 1 to 8?

Back

The probability of landing on an even number is P(evens) = \frac{4}{8} = \frac{1}{2}.

Front

In a situation where there are 3 colas, 2 waters, and 1 lemonade, what is the probability of selecting a cola?

Back

The probability of selecting a cola is P(coke) = \frac{3}{6} = \frac{1}{2}.