Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 83  89 of 101
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Question number: 83
» Statistics and Probability
Question
If the mean of 17 observations is 22 and that of another 18 observations is 10, then the mean of 35 observations is ________
Choices
Choice (4)  Response  

a.  24  
b.  15.83  
c.  15  
d.  24.8 
Question number: 84
» Statistics and Probability
Question
Two dice are thrown simultaneously. The probability of getting an even number as the sum is________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 85
» Statistics and Probability
Question
The median of the following numbers 45, 36, 88, 65, 44, 21, 85, 47, 74 is________
Choices
Choice (4)  Response  

a.  47  
b.  54  
c.  88  
d.  74 
Passage
The temperature chart of a patient is given below:
Question number: 86 (1 of 5 Based on Passage) Show Passage
» Statistics and Probability
Question
The average temperature of the patient between 13.00 hrs, 15.00 hrs and 17.00 hrs is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 87 (2 of 5 Based on Passage) Show Passage
» Statistics and Probability
Question
The average temperature of the patient between 17.00 hrs, 19.00 hrs and 21.00 hrs is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 88 (3 of 5 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage decrease in temperature between 17.00 hrs and 19.00 hrs is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 89 (4 of 5 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage increase in temperature between 11.00 hrs and 15.00 hrs is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
