**Table: Number of Scooters (in thousands) Manufactured by Companies A, B, C, and D (2012 - 2015)**

| Years | A | B | C | D |
|-------|------|------|------|------|
| 2012 | 360 | 420 | 380 | 520 |
| 2013 | 580 | 940 | 570 | 980 |
| 2014 | 1000 | 780 | 1020 | 1090 |
| 2015 | 1240 | 950 | 1180 | 1660 |

**Question:**
The average number of scooters produced by company D is what percent (rounded off to 2 decimal places) more than the combined average number of scooters produced by the three companies A, B, and C?

Question

**Table: Number of Scooters (in thousands) Manufactured by Companies A, B, C, and D (2012 - 2015)**

| Years | A    | B    | C    | D    |
|-------|------|------|------|------|
| 2012  | 360  | 420  | 380  | 520  |
| 2013  | 580  | 940  | 570  | 980  |
| 2014  | 1000 | 780  | 1020 | 1090 |
| 2015  | 1240 | 950  | 1180 | 1660 |

**Question:**
The average number of scooters produced by company D is what percent (rounded off to 2 decimal places) more than the combined average number of scooters produced by the three companies A, B, and C?

Accepted Answer

Step 1: Calculate the average scooters produced by Company D
D values: 520, 980, 1090, 1660
Average of D = (520 + 980 + 1090 + 1660) / 4 = 4250 / 4 = 1062.5 thousand
Step 2: Calculate the average scooters produced by Companies A, B, and C individually
Average of A = (360 + 580 + 1000 + 1240) / 4 = 3180 / 4 = 795
Average of B = (420 + 940 + 780 + 950) / 4 = 3090 / 4 = 772.5
Average of C = (380 + 570 + 1020 + 1180) / 4 = 3150 / 4 = 787.5
Step 3: Calculate the combined average of A, B, and C
Combined Average = (795 + 772.5 + 787.5) / 3 = 2355 / 3 = 785 thousand
Step 4: Calculate the percentage by which D's average exceeds the combined average of A, B, C
Percentage = [(Average of D − Combined Average of A, B, C) / Combined Average of A, B, C] × 100
= [(1062.5 − 785) / 785] × 100
= [277.5 / 785] × 100
= 35.35%
Answer: Option 4 — 35.35%

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