Probability of Simple Events

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, or as a percentage.

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 or 100%.

Front

What is the probability of an event that is impossible?

Back

The probability of an event that is impossible is 0 or 0%.

Front

How do you calculate the probability of a simple event?

Back

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

Front

If a spinner has 4 equal sections (red, blue, green, yellow), what is the probability of landing on blue?

Back

1/4 or 25%.

Front

What is the probability of rolling a number greater than 4 on a 6-sided die?

Back

1/3 (only 5 and 6 are greater than 4).

Front

If there are 3 red, 2 blue, and 5 green marbles, what is the probability of picking a red marble?

Back

3/10.

Front

What does it mean if two events are independent?

Back

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

Front

What is the probability of rolling a 2 or a 5 on a 6-sided die?

Back

1/3 (2 favorable outcomes: 2 and 5).

Front

What is the total number of outcomes when flipping a coin?

Back

2 (heads or tails).