171. Starting with 8000 workers, the company increases the number of workers by 5%, 10% and 20% at the end of first, second and third year respectively. The number of workers in the fourth year was

1. 1. 10188

   
   
   

   2. 11088

   
   
   

   3. 11008

   
   
   

   4. 11808

   
   
   

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1. View Hint View Answer Discuss in Forum

   Required number of workers
   

   = 8000 ×	105	×	110	×	120	= 11088
   	100		100		100

   Correct Option: B

   Required number of workers
   

   = 8000 ×	105	×	110	×	120	= 11088
   	100		100		100

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172. If “basis points” are defined so that 1 per cent is equal to 100 basis points, then by how many basis points is 82.5 per cent greater than 62.5 per cent ?

1. 1. 0.2

   
   
   

   2. 20

   
   
   

   3. 200

   
   
   

   4. 2000

   
   
   

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1. View Hint View Answer Discuss in Forum

   1% = 100 basis points
   ∴ 82.5% = 8250 basis points and 62.5% = 6250 basis points
   ∴ Required difference
   = 8250 – 6250
   = 2000 basis points

   Correct Option: D

   1% = 100 basis points
   ∴ 82.5% = 8250 basis points and 62.5% = 6250 basis points
   ∴ Required difference
   = 8250 – 6250
   = 2000 basis points

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173. In the last financial year, a car company sold 41,800 cars. In this year, the target is to sell 51,300 cars. By what per cent must the sale be increased ?

1. 1. 11	9	%
      	22

   
   
   

   2. 8	9	%
      	22

   
   
   

   3. 8	11	%
      	23

   
   
   

   4. 22	8	%
      	11

   
   
   

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1. View Hint View Answer Discuss in Forum

   Percentage increase in sales
   

   =		51300 - 41800			× 100
   		41800

   
   

   =	9500	=	250	= 22	8	%
   	418		11		11

   Correct Option: D

   Percentage increase in sales
   

   =		51300 - 41800			× 100
   		41800

   
   

   =	9500	=	250	= 22	8	%
   	418		11		11

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174. In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts was

1. 1. 7

   
   
   

   2. 6.5

   
   
   

   3. 7.5

   
   
   

   4. 8

   
   
   

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1. View Hint View Answer Discuss in Forum

   Defective parts of 120 machine parts
   

   =	120 × 5	= 6
   	100

   
   Defective parts of 80 machine parts
   

   =	80 × 10	= 8
   	100

   
   Total defective parts
   = 6 + 8 = 14
   ∴ Required percent
   

   =	20	× 100 = 7%
   	200

   Correct Option: A

   Defective parts of 120 machine parts
   

   =	120 × 5	= 6
   	100

   
   Defective parts of 80 machine parts
   

   =	80 × 10	= 8
   	100

   
   Total defective parts
   = 6 + 8 = 14
   ∴ Required percent
   

   =	20	× 100 = 7%
   	200

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175. A line of length 1.5 metres was measured as 1.55 metres by mistake. What will be the value of error per cent ?

1. 1. 0.05%

   
   
   

   2. 3	7	%
      	31

   
   
   

   3. 3	1	%
      	3

   
   
   

   4. 0.5%

   
   
   

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1. View Hint View Answer Discuss in Forum

   Error = (1.55 – 1.5) metre = 0.55 metre
   

   ∴ Error per cent =	0.05	× 100
   	1.5

   
   

   =	50	=	10	= 22	1	%
   	15		3		3

   Correct Option: C

   Error = (1.55 – 1.5) metre = 0.55 metre
   

   ∴ Error per cent =	0.05	× 100
   	1.5

   
   

   =	50	=	10	= 22	1	%
   	15		3		3

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