Free Printable SIMPLE PROBABILITY 1

1.

The probability of an event is 1/9. What's the probability of the complement to this event?

a)

1/9

b)

1

c)

2/9

d)

8/9

2.

The probability of an event is 14/16. What's the probability of the complement to this event written as a fraction in simplest form?

a)

2/16

b)

1/8

c)

7/8

d)

14/16

3.

A bag of marbles has 8 red marbles and 6 purple marbles. Jennifer will randomly select 1 marble from the bag. What is the probability that she will NOT select a purple marble?

a)

$\frac{3}{7}$

b)

$\frac{4}{7}$

c)

$\frac{3}{4}$

d)

$\frac{4}{5}$

4.

If you spun the spinner 1 time, what is the probability it will land on a black piece?

a)

1 / 7

b)

2 / 7

c)

3 / 7

d)

6 / 7

5.

What is the probability of choosing a red marble if there are 8 red marbles in a jar of 15?

a)

$P'=\frac{15}{7}$

b)

$P'=\frac{7}{15}$

c)

$P'=\frac{8}{15}$

d)

$P'=\frac{15}{8}$

6.

Given a set of

T = {K, E, B, A, R, A, N, G, K, A, L, I, A, N}

One letter is randomly selected from the set. Find the probability that the letter is a vowel letter

a)

$\frac{2}{7}$

b)

$\frac{3}{7}$

c)

$\frac{4}{7}$

d)

$\frac{5}{7}$

7.

The following letter cards are included in the box.

M A T E M A T I K

Find the probability that the letter is a consonant?

a)

$\frac{5}{9}$

b)

$\frac{3}{9}$

c)

$\frac{1}{9}$

d)

$\frac{4}{9}$

8.

There are 25 pens in one box. 6 pens are blue, 4 pens are red and the rest are green. A pen is randomly selected from the box. What is the probability of obtaining a green pen?

a)

3/5

b)

2/5

c)

6/25

d)

4/25

9.

What is the probability of this event not happening, if the probability it happen is

\frac{3}{5}

?

a)

$\frac{1}{5}$

b)

$\frac{2}{5}$

c)

$\frac{4}{5}$

d)

$1$

10.

At the clothing store, the probability of choosing a jacket at random is 34%. What is the probability of complement?

a)

P(not jacket)= 56%

b)

P(jacket) = 66%

c)

P(not jacket) = 50%

d)

P(not jacket) = 66%

SIMPLE PROBABILITY 1

Total questions: 10

Worksheet time: 20mins

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