IMO Mathematics Olympiad Class 10: Questions 399  405 of 958
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Question number: 399
Question
One card is drawn from a wellshuffled deck of 52 cards the probability of neither a Club nor a king is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 400
Question
The mean of six numbers is 15. If one number is excluded, then their mean is 17, the excluded number is ________
Choices
Choice (4)  Response  

a.  7 

b.  4 

c.  1 

d.  5 

Question number: 401
Question
If are the vertices of a right angle triangle, right angle at P, then a is ________
Choices
Choice (4)  Response  

a.  11 

b.  6 

c.  10 

d.  12 

Question number: 402
Question
Find the area of triangle if the coordinates of vertices are is ________
Choices
Choice (4)  Response  

a.  3 sq. units 

b.  5 sq. units 

c.  9sq. units 

d.  8sq. units. 

Question number: 403
Question
Find the area of triangle if the coordinates of vertices are is ________
Choices
Choice (4)  Response  

a.  3 sq. units 

b.  5 sq. units 

c.  4 sq. units 

d.  7 sq. units 

Question number: 404
Question
Two dice are thrown at a time. The probability that the difference of the numbers shown on the dice is 2 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 405
Question
The mean of 20 observations is. if each observation is multiplied by 2, then what is the new mean?
Choices
Choice (4)  Response  

a.  60 

b.  30 

c.  70 

d.  50 
