Probability of Simple Events

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What is a simple event in probability?

Back

A simple event is an event that consists of a single outcome.

Front

How do you calculate the probability of a simple event?

Back

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

Front

If a bag contains 3 red balls and 2 blue balls, what is the probability of picking a red ball?

Back

P(red) = 3/(3+2) = 3/5.

Front

What is the probability of selecting a gray t-shirt from 7 t-shirts, 2 of which are gray?

Back

P(gray) = 2/7.

Front

A spinner has 4 equal sections numbered 1 to 4. What is the probability of landing on 3?

Back

P(3) = 1/4 = 25%.

Front

In a class of 30 students, 12 are girls. What is the probability of randomly selecting a girl?

Back

P(girl) = 12/30 = 2/5.

Front

What is the probability of selecting a piece of pie from 14 desserts, 6 of which are pie?

Back

P(pie) = 6/14 = 3/7.

Front

If there are 10 blackberry muffins out of 34 total muffins, what is the probability of selecting a blackberry muffin?

Back

P(blackberry) = 10/34 = 5/17.

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.