SSC CGL (SSC Combined Graduate Level) Mathematics: Questions 402  406 of 425
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Question number: 402
» Average
Question
The average marks of 50 students in a test is 80. Later it is found that three marks 60,70 & 80 were wrongly entered as 62,72 & 82. The average marks after mistakes were rectified is
Choices
Choice (4)  Response  

a. 


b. 


c.  71.6 

d.  79.98 

Question number: 403
Question
A man bought a secondhand typewriter for Rs. 1000 and spent Rs. 600 on its repairs. He sold it for Rs. 2000. His profit percent is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 404
» Average
Question
The distance between two stations P and Q is 1200 km. A train starts from P and moves towards Q at an average speed of 40 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 80 km/hr. How far from P will they cross each other?
Choices
Choice (4)  Response  

a.  600 km 

b.  200 km 

c.  400 km 

d.  500 km 

Question number: 405
» Surds
Question
The square root of is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 406
» Average
Question
The distance between two stations P and Q is 800 km. A train starts from P and moves towards Q at an average speed of 30 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 70 km/hr. How far from P will they cross each other?
Choices
Choice (4)  Response  

a.  240 km 

b.  100 km 

c.  541 km 

d.  300 km 
