Simple Proability

Front

What is probability?

Back

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

Front

What does it mean if an event is 'certain'?

Back

An event is 'certain' if it is guaranteed to happen, with a probability of 1.

Front

What does it mean if an event is 'impossible'?

Back

An event is 'impossible' if it cannot happen at all, with a probability of 0.

Front

What is an 'unlikely' event?

Back

An 'unlikely' event is one that has a low probability of occurring, closer to 0 than to 1.

Front

How do you calculate the probability of an event?

Back

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

Front

If you have 5 red marbles and 3 blue marbles, what is the probability of picking a blue marble?

Back

Probability = 3/(5+3) = 3/8.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

Probability = 1/6.

Front

If you have 10 coins: 4 quarters, 3 dimes, and 3 nickels, what is the probability of pulling out a quarter?

Back

Probability = 4/10 = 2/5.

Front

What is the probability of drawing a heart from a standard deck of cards?

Back

Probability = 13/52 = 1/4.

Front

If you have 8 blue, 6 green, and 4 red marbles, what is the probability of picking a green marble?

Back

Probability = 6/(8+6+4) = 6/18 = 1/3.