7th Grade Milestone Review - Probability of Simple Events

Front

What is the theoretical probability of an event?

Back

The theoretical probability of an event is the ratio of the number of favorable outcomes to the total number of possible outcomes.

Front

How do you calculate the probability of pulling a specific color marble from a bag?

Back

Divide the number of marbles of that color by the total number of marbles in the bag.

Front

What is the probability of selecting a heart from a standard deck of cards?

Back

1/4, because there are 13 hearts in a deck of 52 cards.

Front

How do you find the probability of NOT selecting a specific item?

Back

Subtract the probability of selecting that item from 1.

Front

What is experimental probability?

Back

Experimental probability is calculated based on the outcomes of an actual experiment or trial.

Front

How do you calculate experimental probability?

Back

Divide the number of times an event occurs by the total number of trials.

Front

What is the probability of rolling a specific number on a fair six-sided die?

Back

1/6, because there is one favorable outcome and six possible outcomes.

Front

If there are 15 girls and 15 boys in a class, what is the probability of selecting a girl?

Back

1/2, because there are equal numbers of girls and boys.

Front

What is the formula for calculating probability?

Back

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

Front

What does it mean if an event is certain?

Back

If an event is certain, its probability is 1, meaning it will definitely happen.