ArithmeticBasic Statistics (CBSENET (UGC) PaperI): Questions 1  6 of 7
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Question number: 1
» Arithmetic » Basic Statistics
Appeared in Year: 2013
Question
The mean marks obtained by a class of 40 students is 65; The mean marks of half of the students is found to be 45. The mean marks of the remaining students is (December)
Choices
Choice (4)  Response  

a.  60 

b.  85 

c.  70 

d.  65 

Question number: 2
» Arithmetic » Basic Statistics
Appeared in Year: 2015
Question
A group of 210 students appeared in some test. The mean of 1/3rd of students is found to be 60. The mean of the remaining students is found to be 78. The mean of the whole group will be (December)
Choices
Choice (4)  Response  

a.  80 

b.  74 

c.  72 

d.  76 

Question number: 3
» Arithmetic » Basic Statistics
Question
If the radius of a circle is increased by 50 per cent. Its area is increased by:
Choices
Choice (4)  Response  

a.  100 per cent 

b.  50 per cent 

c.  125 per cent 

d.  75 per cent 

Question number: 4
» Arithmetic » Basic Statistics
Question
The number of observations in a group is 40. The average of the first 10 members is 4.5 and the average of the remaining 30 members is 3.5. The average of the whole group is
Choices
Choice (4)  Response  

a.  15/2 

b.  15/4 

c.  6 

d.  4 

Question number: 5
» Arithmetic » Basic Statistics
Question
If the radius of a circle is increased by 50%, the perimeter of the circle will increased by
Choices
Choice (4)  Response  

a.  40% 

b.  50% 

c.  20% 

d.  30% 

Question number: 6
» Arithmetic » Basic Statistics
Question
The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter?
Choices
Choice (4)  Response  

a.  33.33% 

b.  30% 

c.  20% 

d.  25% 
