The following pie chart shows the number of workers of different categories A, B, C, D, E, F, G and H of a factory in 1995.

If the number of workers in category B is increased by 10% and the number of workers in category D is decreased by 5% in 1996, then what is the total no. of workers in categories B and D in 1996, if no. of workers in B was 1500 in the year 1995?

4025

ATQ,

15% of total workers = 1500

Total number of workers = 10000

Number of workers in D = 25% of 10000 = 2500

In 1996 , Number of workers in D = 2500 - \(\frac{1}{20}\) × 2500

= 2375

Number of workers in B =  1500 + \(\frac{1}{10}\) × 1500 = 1650

Total number in 1996 in B & D = 2375 + 1650 = 4025