IMO Mathematics Olympiad Class 10: Questions 377  381 of 908
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Question number: 377
Question
Find the area of triangle if the coordinates of vertices are is ________
Choices
Choice (4)  Response  

a.  20.5 sq. units. 

b.  19.3 sq. units 

c.  33.5 sq. units 

d.  45.2 sq. units 

Question number: 378
Question
The mean weight of a class of 24 students is kg. if the weight of the teacher is included, the mean rises by 400 g. Then the weight of the teacher is ________
Choices
Choice (4)  Response  

a.  55 kg 

b.  45 kg 

c.  65 kg 

d.  50 kg 

Question number: 379
Question
The average temperatures of Monday, Tuesday, Wednesday and Thursday was . The average temperature of Tuesday, Wednesday, Thursday and Friday was . If the temperature on Monday was , then the temperature on Friday was ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 380
Question
If the centroid of the triangle formed by the points is at the origin, then
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 381
Question
The mean of ten numbers is 60. If one number is excluded, then their mean is 50, the excluded number is ________
Choices
Choice (4)  Response  

a.  130 

b.  160 

c.  140 

d.  150 
