Question

two-way table scenario
the table categorizes drivers into age groups (under 30, 30–50, over 50) and whether they regularly use a navigation system (yes, no). data in the table is based on a fictional dataset.

age group	uses navigation (yes)	does not use navigation (no)	total
30–50	400	100	500
over 50	150	350	500
total	750	750	1,500

what percentage of drivers over 50 do not use a navigation system?
25%
30%
70%
50%

Explanation:

Step1: Identify relevant data

For drivers over 50, the number of those who do not use navigation is 350, and the total number of drivers over 50 is 500.

Step2: Calculate the percentage

To find the percentage, use the formula $\text{Percentage} = \frac{\text{Number of drivers over 50 not using navigation}}{\text{Total number of drivers over 50}} \times 100\%$. Substitute the values: $\frac{350}{500} \times 100\% = 0.7 \times 100\% = 70\%$.

Answer:

70%