Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 54  60 of 101
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 919 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 54
» Statistics and Probability
Question
Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.
Choices
Choice (4)  Response  

a.  50 

b.  52 

c.  54 

d.  56 

Question number: 55
» Statistics and Probability
Question
A card is drawn at random from a well shuffled pack of 52 cards. The probability that the ‘9’ of red color card is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Passage
A Train is going on a long journey for 20 hours, starting at 3.00 hrs. The speed of the car at different hours is given below:
Time (in hrs):  3  5  8  10  12  15  18  20  23 
Speed (in km/hour):  60  70  90  50  60  75  60  30  60 
From the above table answer the following questions.
Question number: 56 (1 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The average speed (in km/hour) between 10.00 hrs, 12.00 hrs and 15.00 hrs is ________
Choices
Choice (4)  Response  

a.  62 

b.  63 

c.  68 

d.  57 

Question number: 57 (2 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage of increase in speed during 10.00 hrs and 12.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 58 (3 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
The percentage of decrease in speed during 18.00 hrs and 20.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 59
» Statistics and Probability
Question
Mean marks scored by 40 students were found to be 60. Later it was observed that a score of 48 was misread as 84. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  59.1 

b.  58.2 

c.  59 

d.  58 

Question number: 60
» Statistics and Probability
Question
The mean of 20 items is 17 and if each item is increased by 3, then its mean will be ________
Choices
Choice (4)  Response  

a.  70 

b.  50 

c.  60 

d.  20 
