Free Printable Probability Terminology

1.

Which of the following represents an experiment?

a)

Tossing a biased coin and noting if it comes up as Heads or Tails.

b)

Rolling a pair of dice and calculating the sum of the numbers that appear on top of each die.

c)

Randomly selecting a card from a standard deck of cards.

d)

Apple randomly selecting a sample of new iPhones from total production to test if each device is functioning correctly.

e)

All of the above.

2.

A bag contains seven red balls and three blue balls. A ball is randomly selected from the bag and it's colour is noted. This experiment is repeated 100 times. A success is considered to be selecting a blue ball. Which of the following represents a trial of this experiment?

a)

Selecting a blue ball.

b)

Selecting a red ball.

c)

Randomly selecting a single ball from the bag.

d)

The 100 balls that are randomly selected on each performance of the experiment.

3.

A Grade 10 learner at Sacred Heart College is randomly selected and their class is noted. Which of the following represents an outcome of this experiment?

a)

Esther is randomly selected.

b)

The Grade 10 learner is in 10S.

c)

The learner is in Grade 10.

4.

A letter is randomly selected from the word THEORETICAL. Which of the following represents the correct sample space for this experiment?

a)

$S=\left\{T,\ H,\ E,\ O,\ R,\ I,\ C,\ A,\ L\right\}$

b)

$\left\{T,\ H,\ E,\ O,\ R,\ I,\ C,\ A,\ L\right\}$

c)

THEORETICAL

d)

$S=\left\{T,\ H,\ E,\ O,\ R,\ E,\ T,\ I,\ C,\ A,\ L\right\}$

5.

The numbers 1 to 30 are each written on a separate piece of paper and placed in a hat. A piece of paper is selected at random. Which of the following represents an event?

a)

An even number is drawn.

b)

$A=\left\{10,\ 20,\ 30\right\}$

c)

The Sample Space.

d)

$B=\varnothing$

e)

All of the above.

6.

A circular spinner is divided up into five equal sectors. Paint is used to colour the sectors red, blue, green, orange and purple. The spinner is then spun and when it stops, the colour of the sector to which it points is noted. Which of the following represents an elementary event?

a)

A primary colour.

b)

$A=\left\{green,\ orange\right\}$

c)

$B=\left\{green\right\}$

d)

Colours that make purple.

7.

Which of the following represents a null event?

a)

Winning the lotto.

b)

You passing the next Mathematics test if you study hard.

c)

It rains tomorrow.

d)

Rolling a 7 on a fair six-sided die.

8.

What is the mathematical definition of probability?

a)

The likelihood that an outcome occurs.

b)

The relative frequency of an event.

c)

$P\left(A\right)=\frac{n\left(A\right)}{n\left(S\right)}$

d)

$P\left(A\ '\right)=1-P\left(A\right)$

9.

What is the probability of a certain event?

a)

0

b)

0,5

c)

One divided by the number of outcomes in the sample space.

d)

1

10.

Equally likely events...

a)

Each have the same probability of occurring.

b)

Have a 50% chance of occurring.

c)

Are very likely to occur.

d)

Are biased.

Probability Terminology

Total questions: 10

Worksheet time: 5mins

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