BASIC PROBABILITY

EXPERIMENT

• A situation involving chance or probability that leads to results.

• The result of an experiment.

• A set of all possible outcomes.

• A set of outcomes which satisfy a given condition.

OUTCOMES

• A situation involving chance or probability that leads to results.

• The result of an experiment.

• A set of all possible outcomes.

• A set of outcomes which satisfy a given condition.

SAMPLE SPACE

• A situation involving chance or probability that leads to results.

• The result of an experiment.

• A set of all possible outcomes.

• A set of outcomes which satisfy a given condition.

EVENT

• A situation involving chance or probability that leads to results.

• The result of an experiment.

• A set of all possible outcomes.

• A set of outcomes which satisfy a given condition.

What is the probability to get March if a month is chosen randomly from a year?

•  $\frac{1}{12}$  

• 1

• 3

•  $\frac{3}{12}$  

What is the probability selecting a day starts with the letter T if a day is chosen randomly from a week?

•  $\frac{2}{7}$  

• 2

• 7

•  $\frac{1}{7}$  

If a coin is flipped, what is the probability to get tail?

• $\frac{1}{2}$

• 1

• 2

• $\frac{2}{1}$

A dice is rolled. What is the probability to get a number more than 2?

• $\frac{2}{3}$

• $\frac{5}{6}$

• $\frac{1}{6}$

• $\frac{1}{3}$

There are 3 red marbles, 4 blue marbles and 5 yellow marbles in a jar. 

What is the probability to get a blue marble if a marble is drawn at random?

• $\frac{1}{3}$

• $\frac{4}{13}$

• 4

• $\frac{4}{11}$

There are 3 red marbles, 4 blue marbles and 5 yellow marbles in a jar. 

What is the probability to get a not red marble if a marble is drawn at random?

•  $\frac{3}{4}$ 

•  $\frac{3}{12}$ 

• 3

•  $\frac{1}{4}$