IMO Mathematics Olympiad Class 10: Questions 468  473 of 908
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Question number: 468
Question
The average temperatures of Tuesday, Wednesday and Thursday was . The average temperature of Wednesday, Thursday and Friday was . If the temperature on Tuesday was , then the temperature on Friday was ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 469
Question
The algebraic sum of the deviations of a frequency distribution from its mean is ________
Choices
Choice (4)  Response  

a.  A nonzero number 

b.  Always negative 

c.  Always positive 

d.  0 

Question number: 470
Question
The mean of 10 observations is . if each observation is multiplied by 2, then what is the new mean?
Choices
Choice (4)  Response  

a.  16 

b.  15 

c.  11 

d.  17 

Question number: 471
Question
The distance between the points is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 472
Question
If are the midpoints of the sides of , the area of the triangle is ________
Choices
Choice (4)  Response  

a.  55 sq. units 

b.  35 sq. units 

c.  29 sq. units 

d.  44 sq. units 

Question number: 473
Question
The coordinates of the midpoints of the sides of a triangle are . What will be the coordinates of the centroid of the triangle?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

