IMO Mathematics Olympiad Class 10: Questions 424  428 of 699
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Question number: 424
Question
A bag contains 6 blue and 4 green marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is green, is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 425
Question
In a , coordinates of J are and the equations of the medians through K and L is and respectively, so the coordinates of K and L are ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 426
Question
The coordinates of the third vertex of an equilateral triangle whose two vertices are at are ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 427
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: 428
Question
The average of 15 results is 50. If the average of the first seven results is 82 and that of the last seven is 92, then the seventh result is ________
Choices
Choice (4)  Response  

a.  468  
b.  488  
c.  466  
d.  486 