Pre/Post Test Falcon Focus 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

How do you calculate the probability of an event?

Back

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

Front

If George picks 16 apples and 2 have worms, what is the probability of picking an apple with a worm?

Back

Probability = 2/16 = 1/8.

Front

If George picks 64 apples, how many are expected to have worms?

Back

Expected worms = (64 apples) * (2/16) = 8 apples.

Front

What is the probability of selecting a yellow ball from a box of 20 balls with 10 yellow?

Back

Probability = 10/20 = 1/2.

Front

What is the probability of selecting a red ball after a yellow ball?

Back

Probability = (Number of red balls) / (Total remaining balls).

Front

In a bag of 40 jelly beans with 5 black, what is the probability of picking a black jelly bean?

Back

Probability = 5/40 = 1/8.

Front

If there are 160 jelly beans, how many are expected to be black?

Back

Expected black jelly beans = (160) * (5/40) = 20.

Front

What is the probability of picking a gold coin from a bag with 2 gold coins out of 15 total coins?

Back

Probability = 2/15.

Front

If a player has a 4/5 probability of scoring, how many baskets would he make out of 30 attempts?

Back

Expected baskets = (30 attempts) * (4/5) = 24 baskets.