Probability of Simple Events

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

How do you calculate the probability of a simple event?

Back

The probability of a simple event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

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 event that is impossible?

Back

The probability of an event that is impossible is 0.

Front

If a spinner has 8 equal sections, what is the probability of landing on any one specific section?

Back

The probability of landing on any one specific section is 1/8.

Front

In a bag with 5 red balls and 3 blue balls, what is the probability of picking a red ball?

Back

The probability of picking a red ball is 5/8.

Front

What does it mean if two events are independent?

Back

Two events are independent if the occurrence of one event does not affect the probability of the other event.

Front

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

Back

P(A or B) = P(A) + P(B) - P(A and B). For independent events, P(A and B) = P(A) * P(B).

Front

How do you express probability as a percentage?

Back

To express probability as a percentage, multiply the probability by 100.

Front

What is the probability of spinning a number less than 6 on a spinner with numbers 1 to 8?

Back

The probability is 5/8 or 62.5%.