The percentage of people of south zone who take coffee at least once a day close to:

Answer: Option C

People in south zone
= 1450 + 1120 + 420 + 350 + 50
= 3390
People who take coffee at least once a day
= 1120 + 1450
= 2570
∴ Required percentage
$$\begin{array}{rl}& =\frac{2570}{3390}\times 100\\ & =75.811\%\\ & \approx 75.81\%\end{array}$$