Question : The following table gives the number of different types of batteries sold by a company over the years (numbers in hundreds).
| Type of battery | 7AH | 32AH | 35AH | 55AH |
| Year | ||||
| 2018 | 20 | 30 | 40 | 50 |
| 2019 | 40 | 35 | 45 | 45 |
| 2020 | 50 | 40 | 40 | 40 |
| 2021 | 40 | 50 | 50 | 45 |
| 2022 | 45 | 45 | 35 | 55 |
What is the difference in the number of 7AH batteries sold in 2021 and 2022?
Option 1: 200
Option 2: 700
Option 3: 300
Option 4: 500
Correct Answer: 500
Solution :
The number of 7AH batteries sold in 2021 = 4000
The number of 7AH batteries sold in 2022 = 4500
Difference = 4500 – 4000 = 500
Hence, the correct answer is 500.
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