Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 64  68 of 80
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Question number: 64
» Statistics & Probability
Question
The average temperatures of Tuesday, Wednesday and Thursday was . The average temperature of Wednesday, Thursday and Friday was . If the temperature on Tuesday was , then the temperature on Friday was ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 65
» Statistics & Probability
Question
The algebraic sum of the deviations of a frequency distribution from its mean is ________
Choices
Choice (4)  Response  

a.  A nonzero number 

b.  Always negative 

c.  Always positive 

d.  0 

Question number: 66
» Statistics & Probability
Question
The mean of 10 observations is . if each observation is multiplied by 2, then what is the new mean?
Choices
Choice (4)  Response  

a.  16 

b.  15 

c.  11 

d.  17 

Question number: 67
» Statistics & Probability
Question
Two dice are thrown at a time. The probability that the difference of the numbers shown on the dice is 3 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 68
» Statistics & Probability
Question
The average temperatures of Monday, Tuesday, Wednesday and Thursday was . The average temperature of Tuesday, Wednesday, Thursday and Friday was . If the temperature on Monday was , then the temperature on Friday was ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

