Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 65  70 of 80
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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. 


Question number: 69
» Statistics & Probability
Question
Two dice are thrown simultaneously. The probability of getting a doublet or a total of 4 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 70
» Statistics & Probability
Question
The king, queen and jack of Spades are removed from a deck of 52 playing cards and then wellshuffled. One card is selected from the remaining cards. The probability of getting a Spades is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

