TABLE 6 below shows the average daily flights taken in the top 10 countries, the top 10 aircraft operators for 2022 and the percentage (%) change from 2019 - NSC Mathematical Literacy - Question 5 - 2023 - Paper 1

To find missing value A, we first calculate the percentage change. Using the formula:

$A = \frac{3763 - 4290}{4290} \times 100 \approx -12.28 \quad \Rightarrow \quad A = -12\text{ (rounded to the nearest whole number)}$

The percentage change for the aircraft operators varies, and we can calculate the range as follows:

• % Change from the highest operator’s increase to the lowest.

The highest increase is from Wizz Air Group (increase of 2%) and the lowest from Lufthansa Airlines (decrease of around 12%), leading to:

ext{Range} = 2 ext{%} - (-12 ext{ %}) = 14 ext{ %}.

Given that the mean is 1 028.2 and involves total flights divided by the number of operators:

Let B be the total number of flights. Therefore,

$B = (1 028.2 imes 10) = 10 282$.

Now, accounting for the top flights:

$A + B + \ldots + 536 = 10 282$,

resulting in B calculated directly.

To find this probability, we identify operators that saw an increase.

If 2 out of the 10 operators showed an increase, the probability is given by:

$P = \frac{2}{10} = 0.2$.