Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 90  95 of 101
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Passage
The temperature chart of a patient is given below:
Question number: 90 (5 of 5 Based on Passage) Show Passage
» Statistics and Probability
Question
The average temperature of the patient between 17.00 hrs, 19.00 hrs and 21.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 91
» Statistics and Probability
Question
A number x is chosen at random from the numbers 3, 2, 1, 0, 1, 2, 3. The probability that is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 92
» Statistics and Probability
Question
A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________
Choices
Choice (4)  Response  

a.  3 

b.  7 

c.  5 

d.  2 

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. 

