7th Grade Probability

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.

Front

What is a tree diagram?

Back

A tree diagram is a visual representation that shows all possible outcomes of an event.

Front

How do you calculate the total number of outcomes in a probability experiment?

Back

Multiply the number of choices for each event together.

Front

What is the formula for calculating probability?

Back

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

Front

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

Back

It means the event is impossible and will not occur.

Front

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

Back

It means the event is certain and will definitely occur.

Front

If you have 3 shirts, 2 pairs of pants, and 2 pairs of shoes, how many outfit combinations can you make?

Back

12 outfits (3 shirts x 2 pants x 2 shoes = 12).

Front

What is the probability of spinning an odd number on a spinner with numbers 1-6?

Back

The probability is 3/6 or 1/2, since there are 3 odd numbers (1, 3, 5).

Front

How do you find the probability of selecting a specific item from a group?

Back

Divide the number of that specific item by the total number of items in the group.

Front

What is the probability of selecting a brown M&M from a bowl with 20 total M&Ms?

Back

1/10, since there are 2 brown M&Ms out of 20.