The total number of EV and petrol cars sold by A is how many more or less than the half of the total number of petrol cars sold by B and D.

Read the following table carefully and answer the questions given below. The table shows the total number of cars (EV, Diesel and petrol) sold and the percentage of EV cars sold out of the total cars sold by four different companies. The table also shows the difference between the petrol and diesel cars sold by these four companies.

Note: Petrol cars sold are more than the diesel cars sold by each company .

Companies	Total number of cars sold	Percentage of EV cars sold	Difference between the petrol and the diesel cars sold
A	400	25%	70
B	550	10%	85
C	360	30%	52
D	280	15%	102

The correct answer is 55.

Let us find the number of EV, petrol, and diesel cars sold by each relevant company step-by-step.

1. Calculations for Company A:
Total number of cars sold by A = 400
Percentage of EV cars sold by A = 25%
Number of EV cars sold by A =
$400\times \frac{25}{100}=100$
Total number of (Petrol + Diesel) cars sold by A =
$400-100=300$
We are given that the difference between petrol and diesel cars sold by A is 70, and petrol cars sold are more than diesel cars. Therefore:
$\text{Petrol}+\text{Diesel}=300$
$\text{Petrol}-\text{Diesel}=70$
Adding both equations:
$2\times \text{Petrol}=370$
$\text{Petrol cars sold by A}=\frac{370}{2}=185$
Total number of EV and petrol cars sold by A =
$100+185=285$

2. Calculations for Company B:
Total number of cars sold by B = 550
Percentage of EV cars sold by B = 10%
Number of EV cars sold by B =
$550\times \frac{10}{100}=55$
Total number of (Petrol + Diesel) cars sold by B =
$550-55=495$
Given the difference between petrol and diesel cars sold by B is 85:
$\text{Petrol}+\text{Diesel}=495$
$\text{Petrol}-\text{Diesel}=85$
Adding both equations:
$2\times \text{Petrol}=580$
$\text{Petrol cars sold by B}=\frac{580}{2}=290$

3. Calculations for Company D:
Total number of cars sold by D = 280
Percentage of EV cars sold by D = 15%
Number of EV cars sold by D =
$280\times \frac{15}{100}=42$
Total number of (Petrol + Diesel) cars sold by D =
$280-42=238$
Given the difference between petrol and diesel cars sold by D is 102:
$\text{Petrol}+\text{Diesel}=238$
$\text{Petrol}-\text{Diesel}=102$
Adding both equations:
$2\times \text{Petrol}=340$
$\text{Petrol cars sold by D}=\frac{340}{2}=170$

4. Calculating the Final Answer:
Total petrol cars sold by B and D =
$290+170=460$
Half of the total petrol cars sold by B and D =
$\frac{460}{2}=230$
Difference between the total number of EV and petrol cars sold by A (285) and half of the petrol cars sold by B and D (230) =
$285-230=55$
Thus, the total number of EV and petrol cars sold by A is 55 more than half of the total number of petrol cars sold by B and D.