The given data is regarding the number of paperback and hardbound books sold by four different book shops A, B, C and D:
| Shops | Hardbound books sold | Paperback books sold |
|---|---|---|
| A | 3500 | 2000 |
| B | 3900 | 5200 |
| C | 4400 | 5500 |
| D | 5500 | 6600 |
What is the difference between the average number of hardbound books sold by shops A, B and D and the average number of paperback books sold by shops C and D?
A267
B400
C1570
D1750 ✓ Correct
Correct answer: (D) 1750
Explanation
Average hardbound of A, B and D = (3500 + 3900 + 5500) / 3 = 12900 / 3 = 4300.
Average paperback of C and D = (5500 + 6600) / 2 = 12100 / 2 = 6050.
Difference = 6050 minus 4300 = 1750.
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