IMO Mathematics Olympiad (SOF) Class 9: Questions 609  615 of 919
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Question number: 609
Question
A contractor employed 10 labourers at Rs. 60 each per day, 12 labourers at Rs. 40 each per day, 8 labourers at Rs. 20 each per day and 6 labourers at Rs. 10 each per day. The average wages paid is ________
Choices
Choice (4)  Response  

a.  Rs. 60 

b.  Rs. 36 

c.  Rs. 26 

d.  Rs. 40 

Question number: 610
Question
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, find the n umber of blue balls in the bag.
Choices
Choice (4)  Response  

a.  15 

b.  10 

c.  5 

d.  20 

Question number: 611
Question
If , and then value of x, y, z when , is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 612
Question
Two coins are tossed simultaneously. The probability of getting at least one head is ________
Choices
Choice (4)  Response  

a. 


b. 


c.  0 

d. 


Question number: 613
» Analytical Reasoning and Logical Reasoning
Question
In a telephone directory which of the following names will appear in the third position
Choices
Choice (4)  Response  

a.  Mahender 

b.  Mahindra 

c.  Mahinder 

d.  Mahendra 

Question number: 614
Question
The mean of 13 observations is 14. If the mean of the first 7 observations is 12 and that of the last 7 observations is 16, then the 7^{th} observation is ________
Choices
Choice (4)  Response  

a.  12 

b.  16 

c.  14 

d.  18 

Question number: 615
» Analytical Reasoning and Logical Reasoning
Question
In the given question, which number can replace the question mark
Choices
Choice (4)  Response  

a.  9 

b.  7 

c.  36 

d.  1 
