What is the difference between the number of diesel engine cars in State-2 and the number of petrol engine cars in State-4?
21
Number of cars in State-2 = 700 x 28100 = 196
Number of diesel cars in State-2 = 196 x 514 = 70
Number of cars in State-4 = 700 x 26100 = 182
Number of petrol cars in State-4 = 182 x 12 = 91
∴ Difference = 91 – 70 = 21