Functional Skills: Probability Tables

a) In total, there are

12 + 14 + 15 + 9 = 50 pupils

14 boys chose to have a packed lunch.

So, the probability is

\dfrac{14}{50} = 0.28

 

b) The number of pupils that chose a hot dinner is

12 + 15 = 27

15 of these are girls.

So, the probability is

\dfrac{15}{27}

a) Complete the table using addition and subtraction, e.g.

196 - 156 = 40 unemployed males

254 - 156 = 98 employed females

40 + 32 = 72 unemployed people in total

98 + 32 = 130 females in total

254 + 72 = 326 people in total

 

The completed table will look like this:

 

b) There are 326 people in total. 72 of these people are unemployed.

So, the probability is

\dfrac{72}{326} = 0.221 (3 dp)

a) Multiply each number in each row with each number in each column.

The table completed table will look like this:

 

b) There are 36 results in total.

The result is 12 a total of 4 times.

Therefore, the probability is

\dfrac{4}{36} = \dfrac{1}{9}

 

c) The results that are over 20 are 24, \, 25, \, 30 and 36

The result is over 20 a total of 6 times out of 36

Therefore, the probability is

\dfrac{6}{36} = \dfrac{1}{6}