IMO Mathematics Olympiad Class 10: Questions 499  504 of 958
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 958 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 499
Question
The average of 11 results is 60. If the average of the first six results is 72 and that of the last six is 52, then the sixth result is ________
Choices
Choice (4)  Response  

a.  87 

b.  88 

c.  84 

d.  86 

Question number: 500
Question
The mean of eight numbers is 30. If one number is excluded, then their mean is 34, the excluded number is ________
Choices
Choice (4)  Response  

a.  5 

b.  2 

c.  8 

d.  6 

Question number: 501
» Triangle, Circle & Constructions
Question
In the adjacent figure, QP and QR are produced to meet RS and PS produced in T and U. then is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 502
Question
The mean of 10 observations is. By error, one observation was noted as was misread as 24. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  21 

b.  27 

c.  25 

d.  23 

Question number: 503
Question
The distance between the points and is ________
Choices
Choice (4)  Response  

a.  3a 

b.  2a 

c.  a 

d.  5a 

Question number: 504
Question
A drawer contains 8 red socks, 12 white socks and 10 blue socks. Without looking you draw out a sock and then draw out a second sock without returning the first sock. What is the probability that the first sock and second sock are both white?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

