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

$dfrac{6}{36} = dfrac{1}{6}$