Probability of Simple Events

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1, or as a percentage.

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 rolling a 3 on a standard six-sided die?

Back

P(3) = 1/6 or approximately 16.67%.

Front

If a spinner has 4 equal sections numbered 1 to 4, what is P(2)?

Back

P(2) = 1/4 or 25%.

Front

What is the probability of selecting a red marble from a bag containing 3 red marbles and 5 blue marbles?

Back

P(red) = 3/(3+5) = 3/8.

Front

What does it mean if an event has a probability of 0?

Back

An event with a probability of 0 means that the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

An event with a probability of 1 means that the event is certain to occur.

Front

In a class of 20 students, 8 are girls. What is the probability of randomly selecting a girl?

Back

P(girl) = 8/20 = 2/5.

Front

If a bag contains 10 candies, 4 of which are chocolate, what is the probability of picking a chocolate candy?

Back

P(chocolate) = 4/10 = 2/5.

Front

What is the probability of flipping a coin and getting tails?

Back

P(tails) = 1/2 or 50%.