Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 1  6 of 101
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Question number: 1
» Statistics and Probability
Question
A die is rolled 10, 500 times. The frequency of each outcome is shown in the table. What is the empirical probability of the outcomes of multiples of 3?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 2
» Statistics and Probability
Question
Two dice are thrown. What is the probability of obtaining a total of 10 or 11?
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 3
» Statistics and Probability
Question
The median of the following numbers 99, 54, 78, 65, 35, 45, 66 is________
Choices
Choice (4)  Response  

a.  66 

b.  35 

c.  54 

d.  65 

Question number: 4
» Statistics and Probability
Question
The mean weight of 80 students in a class is 60 kg. The mean weight of boys is 70 kg while that of the girls is 50 kg. the number of boys and girls are________
Choices
Choice (4)  Response  

a.  35, 75 

b.  45, 35 

c.  40, 40 

d.  10, 30 

Question number: 5
» Statistics and Probability
Question
If a number x is chosen at random from the numbers 1, 2, 3 and the number y is selected from 1, 4, 9, and then is________
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 6
» Statistics and Probability
Question
A contractor employed 18 labourers at Rs. 12 each per day, 10 labourers at Rs. 13.50 each per day, 5 labourers at Rs. 25 each per day and 2 labourers at Rs. 42 each per day. The average wages paid is ________
Choices
Choice (4)  Response  

a.  Rs. 28 

b.  Rs. 24 

c.  Rs. 20 

d.  Rs. 16 
