Probability 7th grade

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 the probability of selecting an odd number from the numbers 1-15?

Back

8/15

Front

What is the probability of drawing two yellow marbles without replacement from a bag containing 3 green and 2 yellow marbles?

Back

1/10

Front

What is the probability of drawing two yellow marbles with replacement from a bag containing 3 green and 2 yellow marbles?

Back

4/25

Front

How do you calculate the probability of an event?

Back

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

Front

If a number cube is rolled 24 times, how many unsuccessful rolls can be predicted if winning requires rolling a 4?

Back

20 unsuccessful rolls.

Front

What is the probability of selecting a boy from a group of 12 students, 8 girls and 4 boys?

Back

1/3

Front

What is a favorable outcome in probability?

Back

A favorable outcome is an outcome that satisfies the conditions of the event we are interested in.

Front

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

Back

It means the event is impossible and will not occur.

Front

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

Back

It means the event is certain to occur.