IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 430  436 of 968
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Question number: 430
Question
The mean of 50 observations is 44. By error, one observation was noted as was misread as 56. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  78.5 

b.  32.5 

c.  65.5 

d.  43.6 

Question number: 431
Question
Area of quadrilateral formed by the vertices is ________
Choices
Choice (4)  Response  

a.  310 sq. units 

b.  206 sq. units 

c.  289 sq. units 

d.  196 sq. units 

Question number: 432
Question
Two dices are thrown simultaneously. The probability of getting a sum of 8 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 433
Question
In a single throws of a die, the probability of getting a number is greater than 2 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 434
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. 


Question number: 435
Question
A bag contains Five green, four blue and Three orange marbles. If a marble is picked at random, then the probability that it is not an orange marble, is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 436
Question
Find the area of the quadrilateral, the coordinates of whose angular points taken in order are.
Choices
Choice (4)  Response  

a.  20.5 

b.  82 

c.  41 

d.  61.5 
