Probability 7th Grade Math

Front

What is probability?

Back

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

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.

Front

What is the probability of an event that is impossible?

Back

The probability of an event that is impossible is 0.

Front

How do you calculate the probability of a single event?

Back

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

Front

If a spinner has 3 equal sections (red, blue, white), what is the probability of landing on blue?

Back

1/3

Front

What is the probability of NOT landing on red in a spinner with 3 equal sections (red, blue, white)?

Back

2/3

Front

If Tech Group Corporation accepts 1 out of every 20 applicants, what is the probability of NOT being accepted?

Back

95%.

Front

How do you find the probability of two independent events occurring together?

Back

Multiply the probabilities of each event: P(A and B) = P(A) * P(B).

Front

A box contains 20 balls: 10 yellow, 6 red, and 4 black. What is the probability of selecting a yellow ball and then a red ball?

Back

3/20.

Front

What is a tree diagram in probability?

Back

A tree diagram is a visual representation of all possible outcomes of an event, showing the paths to each outcome.