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 the missing value A, we use the formula for percentage change:

$A = \frac{3 \text{ (Average Daily Flights in 2022)} - 4 290 \text{ (Average Daily Flights in 2019)}}{4 290} \times 100$

Using the daily flight value of 3 763 for 2022:

ightarrow A = 2 966 \text{ (after rounding to the nearest whole number)}$$

To find the range for percentage change, we need to identify the maximum and minimum percentage changes:

• Maximum % change = +29%
• Minimum % change = -15%

Range = Maximum - Minimum:

$\text{Range} = 29\% - (-15\%) = 29\% + 15\% = 44\%$

Using the mean to solve for B:

$B + 536 + 547 + 566 + 2 566 = 1 028,2 \times 10$

Solving gives:

$B = 1 028,2 \times 10 - (536 + 547 + 566 + 2 566) = 642$

To calculate the probability:

• Total operators = 10
• Operators with increased flights = 2 (only Wizz Air Group and Ryanair Group)

Probability = ( P = \frac{2}{10} = 0.2 )