# Probability of Picking Numbers (1)

In this worksheet, students calculate the probability of choosing or not choosing certain numbers.

Key stage:  KS 3

Curriculum topic:   Probability

Curriculum subtopic:   Record, Describe and Analyse Probability Experiments

Difficulty level:

### QUESTION 1 of 10

Probability is written as a fraction.

On the top (numerator) of the fraction, we place the number of options we are looking for.

On the bottom (denominator) of the fraction, we place the total number of possible combinations.

Example

Look at these number cards.

What is the probability of selecting a number greater than 8?

There are 4 options that "we are looking for" (these are 9, 10, 11 and 12)

There are 12 "possible combinations".

The probability of choosing a number greater than 8 is 4/12 which reduces to 1/3

Look at these number cards.

What is the probability of selecting at random a number greater than 6?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number greater than or equal to 6?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number greater than 2?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is a multiple of 5?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is not a multiple of 3?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is a factor of 20?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is prime?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is greater than 12?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is not a multiple of 4?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

Look at these number cards.

What is the probability of selecting at random a number which is not a factor of 60?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

• Question 1

Look at these number cards.

What is the probability of selecting at random a number greater than 6?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

1/2
• Question 2

Look at these number cards.

What is the probability of selecting at random a number greater than or equal to 6?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

7/12
• Question 3

Look at these number cards.

What is the probability of selecting at random a number greater than 2?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

5/6
• Question 4

Look at these number cards.

What is the probability of selecting at random a number which is a multiple of 5?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

1/6
• Question 5

Look at these number cards.

What is the probability of selecting at random a number which is not a multiple of 3?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

2/3
• Question 6

Look at these number cards.

What is the probability of selecting at random a number which is a factor of 20?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

5/12
• Question 7

Look at these number cards.

What is the probability of selecting at random a number which is prime?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

5/12
• Question 8

Look at these number cards.

What is the probability of selecting at random a number which is greater than 12?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

0
• Question 9

Look at these number cards.

What is the probability of selecting at random a number which is not a multiple of 4?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

3/4
• Question 10

Look at these number cards.

What is the probability of selecting at random a number which is not a factor of 60?

(write the answer as a fraction in its lowest terms using the / sign e.g. 3/4)

1/3
---- OR ----

Sign up for a £1 trial so you can track and measure your child's progress on this activity.

### What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started