7.SP.7 & 7.SP.8 AIR Review Items

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

How do you calculate the probability of an event?

Back

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

Front

What is the probability of drawing a blue marble from a bag containing 15 blue, 8 green, and 7 red marbles?

Back

15/30 or 1/2.

Front

If a bag contains 6 red, 5 blue, and 4 green marbles, what is the probability of selecting a blue marble?

Back

5/15 or 1/3.

Front

What is the combined probability of two independent events?

Back

The combined probability is the product of the probabilities of each event.

Front

What is the probability of selecting a blue marble from two bags, one with 5 blue marbles and the other with 2 blue marbles?

Back

(5/15) * (2/9) = 10/135 or 2/27.

Front

How do you find the probability of selecting a boy from a class of 12 boys and 14 girls?

Back

Probability = 12/(12+14) = 12/26.

Front

What is the probability of rolling an even number on a number cube (1-6)?

Back

3/6 or 1/2.

Front

What is the probability of rolling an even number followed by a 3 on a number cube?

Back

(1/2) * (1/6) = 1/12.

Front

How do you calculate the probability of selecting a chocolate chip or peanut butter cookie from a bag of 25 cookies?

Back

Probability = (15 + 7) / 25 = 22/25.