Simple 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

What is the formula for calculating probability?

Back

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

Front

If the probability of an event is 0, what does that mean?

Back

It means the event is impossible and will not occur.

Front

If the probability of an event is 1, what does that mean?

Back

It means the event is certain and will definitely occur.

Front

What is the probability of rolling a number cube and getting a number less than 4?

Back

The probability is 3/6 or 1/2, since the numbers less than 4 are 1, 2, and 3.

Front

What is the probability of drawing a red marble from a bag containing 3 red marbles and 7 blue marbles?

Back

The probability is 3/10.

Front

How do you find the total number of items if you know the probability and the number of favorable outcomes?

Back

Total items = (Number of favorable outcomes) / (Probability of the event).

Front

What is the probability of getting a 6 when rolling a fair six-sided die?

Back

The probability is 1/6.

Front

If there are 100 straws and the probability of drawing a short straw is 3/10, how many short straws are there?

Back

There are 30 short straws.

Front

What does it mean if two events are independent in probability?

Back

It means the occurrence of one event does not affect the occurrence of the other event.