Study the given table and answer the question that follows.
The table represents the number of scooters (in thousands) manufactured by four companies A, B, C and D from the period 2012 to 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 |
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?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 35.35%.
The average number of scooters produced by Company D = (520 + 980 + 1090 + 1660)/4 = 4250/4 = 1062.5
The average number of scooters produced by Company A = (360 + 580 + 1000 + 1240)/4 = 3180/4 = 795
The average number of scooters produced by Company B = (420 + 940 + 780 + 950)/4 = 3090/4 = 772.5
The average number of scooters produced by Company C = (380 + 570 + 1020 + 1180)/4 = 3150/4 = 787.5
The combined average number of scooters produced by the three companies A, B, and C = (795 + 772.5 + 787.5)/3 = 2355/3 = 785
Required percentage = [(1062.5 - 785)/785] × 100 = (277.5/785) × 100 = 35.35% (approx)