Statistics and Probability

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 selecting a van from a group of vehicles?

Back

If there are 30 vans out of 100 vehicles, the probability is 30/100 = 3/10.

Front

If you have 2 blue mittens, 6 black mittens, and 8 gray mittens, what is the total number of mittens?

Back

Total mittens = 2 + 6 + 8 = 16 mittens.

Front

What is the probability of drawing a black mitten after one black mitten has already been drawn?

Back

After drawing one black mitten, there are 5 black mittens left out of 15 total mittens, so the probability is 5/15 = 1/3.

Front

What is the probability of rolling an odd number on a die?

Back

There are 3 odd numbers (1, 3, 5) on a die, so the probability is 3/6 = 1/2.

Front

How many total marbles are in a bag containing 3 red, 5 green, 3 blue, and 7 purple marbles?

Back

Total marbles = 3 + 5 + 3 + 7 = 18 marbles.

Front

What is the probability of selecting a red marble after pulling a purple marble from the bag?

Back

After pulling a purple marble, there are 3 red marbles left out of 17 total marbles, so the probability is 3/17.

Front

What is the total number of candies in a jar containing 12 caramels, 7 mints, and 16 dark chocolates?

Back

Total candies = 12 + 7 + 16 = 35 candies.

Front

What is the probability of selecting a mint from the jar?

Back

The probability of selecting a mint is 7 mints out of 35 total candies, so the probability is 7/35.