Study the given table and answer the question that follows.
The given table shows the production of three types of cars (A, B and C) manufactured (in thousands) by an automobile company over the years.
| Year | A | B | C |
| 2015 | 840 | 680 | 890 |
| 2016 | 900 | 750 | 960 |
| 2017 | 760 | 620 | 1000 |
| 2018 | 800 | 540 |
1200 |
For all the years from 2015 to 2018, the average production of B-type cars is how much less (in thousands) than that of the combined average production of A-type and C-type cars?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 271.25.
Average production of type-A cars = (840 + 900 + 760 + 800)/4 = 3300/4 = 825
Average production of type-C cars = (890 + 960 + 1000 + 1200)/4 = 4050/4 = 1012.50
Combined average production of type-A and type-C cars = = 918.75
Average production of type-B cars = (680 + 750 + 620 + 540)/4 = 2590/4 = 647.50
Now, required difference = 918.75 - 647.50 = 271.25