Statistics and Probability (IMO Mathematics Olympiad (SOF) Class 9): Questions 93  99 of 101
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Passage
A Bus is going on a long journey for 25 hours, starting at 6.00 hrs. The speed of the car at different hours is given below:
Time (in hrs):  6  8  9  13  14  18  20  22  25 
Speed (in km/hour):  30  60  50  40  60  70  80  60  20 
From the above table answer the following questions.
Question number: 93 (1 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The average speed (in km/hour) between 6.00 hrs, 8.00 hrs, 9.00 hrs and 13.00 hrs is ________
Choices
Choice (4)  Response  

a.  45 

b.  67 

c.  48 

d.  96 

Question number: 94 (2 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage of increase in speed during 14.00 hrs and 18.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 95 (3 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage of decrease in speed during 22.00 hrs and 25.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 96
» Statistics and Probability
Question
In a class test, in Science, 45 students scored 88 marks, 15 students scored 75 marks and 5 scored 60 marks. The mean of their score is (approximately) ________
Choices
Choice (4)  Response  

a.  75 marks 

b.  83 marks 

c.  80 marks 

d.  90 marks 

Question number: 97
» Statistics and Probability
Question
The mean, median and mode of the following numbers 2,4, 5,6, 7,6, 5,4, 3,2, 1,1, 1,6, 8,8, 4,3, 2,2 are________
Choices
Choice (4)  Response  

a.  3,4, 3 

b.  4,4, 2 

c.  3,3, 5 

d.  3,4, 5 

Question number: 98
» Statistics and Probability
Question
Mean marks scored by 100 students were found to be 120. Later it was observed that a score of 59 was misread as 95. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  179.82 

b.  169 

c.  169.82 

d.  119.64 

Question number: 99
» Statistics and Probability
Question
A contractor employed 14 labourers at Rs. 18 each per day, 12 labourers at Rs. 22 each per day, 9 labourers at Rs. 32 each per day and 5 labourers at Rs. 62 each per day. The average wages paid is ________
Choices
Choice (4)  Response  

a.  Rs. 28 

b.  Rs. 14 

c.  Rs. 30 

d.  Rs. 26 
