Directions (1 – 3): The following table gives the zone-wise survey report of…
2023
Directions (1 – 3): The following table gives the zone-wise survey report of the people of a country regarding how often they take coffee. Study the table and answer the question below.
Take Coffee | North | East | West | South |
|---|---|---|---|---|
More than 3 times a day | 410 | 310 | 700 | 1450 |
1 to 3 times a day | 1220 | 830 | 1250 | 1120 |
Twice a week | 1640 | 710 | 950 | 420 |
Only once a week | 620 | 540 | 530 | 350 |
Never | 950 | 430 | 620 | 50 |
The percentage of people from the zones other than West (i.e., North, East, and South zones combined) who take coffee only once a week is approximately:
- A.
11%
- B.
12%
- C.
13%
- D.
14%
Show answer & explanation
Correct answer: D
Concept: To find what percentage a required group forms of its own total, first fix exactly which categories/zones belong to the required group. Then the numerator is the sum of the specific row's values for only those zones, and the denominator is the sum of ALL rows' values for the same zones (i.e., the combined grand total of just those zones). Percentage = (numerator / denominator) × 100.
Application:
The "zones other than West" are North, East, and South — West is excluded.
Sum the "only once a week" values for these three zones: 620 (North) + 540 (East) + 350 (South) = 1510.
Find each of these zones' grand total across all five frequency rows: North = 410 + 1220 + 1640 + 620 + 950 = 4840; East = 310 + 830 + 710 + 540 + 430 = 2820; South = 1450 + 1120 + 420 + 350 + 50 = 3390.
Add the three zone totals to get the combined denominator: 4840 + 2820 + 3390 = 11050.
Required percentage = (1510 / 11050) × 100 = 13.66%, which rounds to approximately 14%.
Cross-check: The grand total across all four zones is 15100, and West's own total is 4050, so North + East + South = 15100 − 4050 = 11050 — this matches the denominator above. Likewise, the "once a week" grand total across all four zones is 2040, and West's "once a week" figure is 530, so 2040 − 530 = 1510 — this matches the numerator. Both checks confirm 1510/11050 ≈ 13.66% ≈ 14%.