Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 36  41 of 101
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Question number: 36
» Statistics and Probability
Question
Algebraic sum of the deviation of a set of values of a data from their mean is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 37
» Statistics and Probability
Question
Two dice are thrown simultaneously. The probability of getting a multiple of 2 on one die and a multiple of 3 on the other is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 38
» Statistics and Probability
Question
The following observations have been arranged in the ascending order. If the median of the data 13, 26, 32, 37, x + 2, x + 4, 62, 68, 74, 85 is 43, then the value of x is ________
Choices
Choice (4)  Response  

a.  44 

b.  42 

c.  40 

d.  46 

Question number: 39
» Statistics and Probability
Question
The probability of guessing the correct answer to a certain test question is . If the probability of not guessing the correct answer to this question is , then x = ________
Choices
Choice (4)  Response  

a. 


b.  2 

c.  3 

d. 


Question number: 40
» Statistics and Probability
Question
The average of 12 students is 15. The marks of a student who scored zero were wrongly taken as 18 and average was determined. The correct average marks is________
Choices
Choice (4)  Response  

a.  15 

b.  12 

c.  14.5 

d.  13.5 

Question number: 41
» Statistics and Probability
Question
The average weight of the students of a class is 30 kg. 3 new students with the average weight of 36 kg. Having joined the class, the average weight of the class is increased by 3 kg. Find the number of students in the class originally?
Choices
Choice (4)  Response  

a.  3 

b.  4 

c.  5 

d.  6 
