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:

$A = \frac{(A - 4 290)}{4 290} \times 100$

From the data, we know France's average daily flights in 2022 is provided as 3 763. Thus,

$A = \frac{(3 763 - 4 290)}{4 290} \times 100 \approx -12.28 \%$

Rounded to the nearest whole number, A is -12%.

To calculate the range for % change, we identify the highest and lowest % changes:

• The maximum increase is 20% (Ryanair Group).
• The maximum decrease is -15% (Switzerland).

The range is calculated as:

$\text{Range} = \text{Max} - \text{Min} = 20\% - (-15\%) = 35\%$

To find missing value B, we assume the mean is calculated from the sum of all flights divided by the number of operators:

If 1 028 = (B + 536 + 547 + 536 + 536 + 536 + 536)/7, then:

$B + 3 595 = 1 028 \times 7$

Thus, $B = 7 196 - 3 595 = 3 601$

From the data, 2 out of 10 aircraft operators increased their average daily flights. Therefore, the probability is:

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