The following table shows the number of new employees added to different categories of employees in a company and also the number of employees from these categories who left the company every year 

1. ANSWER : D 

Explanation -  Required difference 

= (272 + 240 + 236 + 256 + 288) - (200 + 224 + 248 + 272 + 260)

= 88. 

2. ANSWER : B 

Explanation -  Total number of Peons working in the Company in 1999 

= (820 + 184 + 152 + 196 + 224) - (96 + 88 + 80 + 120)

= 1192. 

3. ANSWER : A 

Explanation - Number of Managers working in the Company: 

In 1995 = 760.
In 2000 = (760 + 280 + 179 + 148 + 160 + 193) - (120 + 92 + 88 + 72 + 96)= 1252.

Therefore, Percentage increase in the number of Managers  

=$\frac{\left(1252-760\right)}{760}\times 100$ %= 64.74%  

Number of Technicians working in the Company:
In 1995 = 1200.
In 2000 = (1200 + 272 + 240 + 236 + 256 + 288) - (120 + 128 + 96 + 100 +112) = 1936.

Therefore, Percentage increase in the number of Technicians 

 = $\frac{\left(1936-1200\right)}{1200}\times 100$ % = 61.33%

Number of Operators working in the Company:

In 1995 = 880.
In 2000 = (880 + 256 + 240 + 208 + 192 + 248) -  (104 + 120 + 100 + 112 + 144) = 1444.

Therefore, Percentage increase in the number of Operators  

=$\frac{\left(1444-880\right)}{880}\times 100$ % = 64.09% 

Number of Accountants working in the Company: 

In 1995 = 1160.
In 2000 = (1160 + 200 + 224 + 248 + 272 + 260) -  (100 + 104 + 96 + 88 + 92) = 1884.

Therefore, Percentage increase in the number of Accountants  

=$\frac{\left(1884-1160\right)}{1160}\times 100$ % = 62.14% 

Number of Peons working in the Company: 

In 1995 = 820.
In 2000 = (820 + 184 + 152 + 196 + 224 + 200) - (96 + 88 + 80 + 120 + 104)    = 1288.

Therefore, Percentage increase in the number of Peons  

=$\frac{\left(1288-820\right)}{820}\times 100$ % = 57.07% 

Clearly, the percentage increase is maximum in case of Managers.

4. ANSWER : B 

Explanation  -  Total number of employees of various categories working in the Company in 1997 are: 

Managers = (760 + 280 + 179) - (120 + 92) = 1007.

Technicians = (1200 + 272 + 240) - (120 + 128) = 1464.

Operators = (880 + 256 + 240) - (104 + 120) = 1152.

Accountants = (1160 + 200 + 224) - (100 + 104) = 1380.

Peons = (820 + 184 + 152) - (96 + 88) = 972.

Therefore, Pooled average of all the five categories of employees working in the Company in 1997 = 1/5 x (1007 + 1464 + 1152 + 1380 + 972)

= 1/5 x (5975)

= 1195.

5. ANSWER : D 

Explanation  - Total number of Operators who left the Company during 1995 - 2000 

= (104 + 120 + 100 + 112 + 144)

= 580.

Total number of Operators who joined the Company during 1995 - 2000

= (880 + 256 + 240 + 208 + 192 + 248

= 2024.

Therefore, Required Percentage

= (580/2024)x100% = 28.66% ~= 29%.