Free Printable Probability - Events and Outcomes

1.

What is meant by a trial in probability?

a)

The result of an experiment

b)

The act of carrying out an experiment

c)

The event you want to happen

d)

A successful outcome

2.

Which of the following is an outcome?

a)

Tossing a coin

b)

Rolling a dice

c)

Getting a 6 when rolling a dice

d)

A probability

3.

Which statement best describes an event?

a)

All possible outcomes

b)

The experiment itself

c)

The outcome or outcomes of interest

d)

A fair experiment

4.

When are two events said to be equally likely?

a)

When they always happen

b)

When they never happen

c)

When they have the same chance of occurring

d)

When one depends on the other

5.

Which formula gives the probability of an event $E$ ?

a)

Possible outcomes $/$ Successful outcomes

b)

Successful outcomes $/$ Possible outcomes

c)

$1 -$ Successful outcomes

d)

Successful outcomes $+$ Possible outcomes

6.

A fair coin is tossed. What is the probability of getting heads?

a)

$0$

b)

$\frac{1}{2}$

c)

$\frac{1}{3}$

d)

$1$

7.

What does the word random tell us in probability questions?

a)

Outcomes are unpredictable

b)

Some outcomes are favoured

c)

All outcomes are equally likely

d)

The experiment is repeated

8.

If $P(E)=\frac{3}{10}$ , what is $P(\text{not }E)$ ?

a)

$\frac{3}{10}$

b)

$\frac{7}{20}$

c)

$\frac{7}{10}$

d)

$\frac{10}{3}$

9.

A disc numbered 1 to 10 is chosen at random. What is the probability of selecting the number 5?

a)

$\frac{1}{5}$

b)

$\frac{1}{10}$

c)

$\frac{5}{10}$

d)

$\frac{9}{10}$

10.

A disc numbered 1 to 10 is chosen at random. What is the probability of selecting an even number?

a)

$\frac{4}{10}$

b)

$\frac{5}{10}$

c)

$\frac{6}{10}$

d)

$\frac{1}{2}$

11.

Tickets numbered 1 to 12 are placed in a box. What is the probability of drawing a two-digit number?

a)

$\frac{2}{12}$

b)

$\frac{3}{12}$

c)

$\frac{10}{12}$

d)

$\frac{1}{12}$

12.

A card is drawn at random from a standard deck of 52 cards. What is the probability of drawing an ace?

a)

$\frac{1}{52}$

b)

$\frac{4}{52}$

c)

$\frac{1}{4}$

d)

$\frac{13}{52}$

13.

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

a)

$\frac{1}{52}$

b)

$\frac{4}{52}$

c)

$\frac{13}{52}$

d)

$\frac{26}{52}$

14.

What is the probability of drawing a black card from a deck of cards?

a)

$\frac{1}{4}$

b)

$\frac{1}{2}$

c)

$\frac{1}{13}$

d)

$\frac{3}{4}$

15.

A bag contains 7 sweets, 2 of which are lemon. What is the probability of not choosing a lemon sweet?

a)

$\frac{2}{7}$

b)

$\frac{1}{7}$

c)

$\frac{5}{7}$

d)

$\frac{7}{7}$

16.

A fair spinner has letters A, B, C and D. What is the probability that it does not land on C?

a)

$\frac{1}{4}$

b)

$\frac{3}{4}$

c)

$\frac{1}{2}$

d)

$1$

17.

A letter is chosen at random from the word IRELAND. What is the probability of selecting a vowel?

a)

$\frac{2}{7}$

b)

$\frac{3}{7}$

c)

$\frac{4}{7}$

d)

$\frac{5}{7}$

18.

In a group of 30 boys and 30 girls, what is the probability of choosing a girl at random?

a)

$\frac{1}{30}$

b)

$\frac{1}{2}$

c)

$\frac{1}{60}$

d)

$\frac{30}{60}$

19.

What is the probability of getting a number less than 4 when rolling a fair six-sided die?

a)

$\frac{1}{2}$

b)

$\frac{4}{6}$

c)

$\frac{3}{6}$

d)

$\frac{2}{6}$

20.

Which of the following best describes a sample space?

a)

Only the desired outcome

b)

The result of a single trial

c)

All possible outcomes of an experiment

d)

The probability of an event

21.

A bag contains 5 red balls and 3 blue balls. What is the probability of picking a blue ball at random?

a)

$\frac{8}{3}$

b)

$\frac{3}{8}$

c)

$\frac{5}{8}$

d)

$\frac{1}{2}$

22.

A bag contains 4 green balls and 6 yellow balls. What is the probability of picking a green ball at random?

a)

$\frac{10}{4}$

b)

$\frac{1}{2}$

c)

$\frac{6}{10}$

d)

$\frac{4}{10}$

23.

What is the probability of getting a number greater than 4 when rolling a fair six-sided die?

a)

$\frac{1}{6}$

b)

$\frac{4}{6}$

c)

$\frac{3}{6}$

d)

$\frac{2}{6}$

24.

Which of the following best describes an impossible event in probability?

a)

An event with more than one outcome

b)

An event that always happens

c)

An event that never happens

d)

An event with equal chance of happening

Probability - Events and Outcomes

Total questions: 24

Worksheet time: 12mins

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