IMO Mathematics Olympiad Class 10: Questions 388  392 of 699
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Question number: 388
Question
If occur with frequencies respectively, then the arithmetic mean is ________
Choices
Choice (4)  Response  

a.  4.4  
b.  5.5  
c.  3.5  
d.  6.5 
Question number: 389
Question
The coordinates of the centre of a circle passing through is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 390
Question
Orthocenter of the triangle formed by the lines and is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 391
Question
A bag contains 6 Red, 9 Blue and 5 Black marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is red or Blue, is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 392
» Triangle, Circle & Constructions
Question
In the adjacent figure, BA and BC are produced to meet CD and AD produced in E and F. then is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
