Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 58  63 of 79
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Question number: 58
» Statistics & Probability
Question
The average of 6 number is 40. If one of the numbers is excluded, the mean gets reduced by 5. Then the excluded number is ________
Choices
Choice (4)  Response  

a.  65  
b.  35  
c.  55  
d.  45 
Question number: 59
» Statistics & Probability
Question
A Train maintains an average speed of 40 km/hr while going from L to M and maintains an average speed of 60 km/hr while coming back from M to L. the average speed of the bus is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 60
» Statistics & Probability
Question
The average of 10 results is 70. If the average of the first five results is 60 and that of the last five is 70, then the fifth result is ________
Choices
Choice (4)  Response  

a.  20  
b.  40  
c.  50  
d.  30 
Question number: 61
» Statistics & Probability
Question
One card is drawn from a wellshuffled deck of 52 cards the probability of the card drawn is a king or queen ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 62
» Statistics & Probability
Question
The mean of a data is ‘p’. if each observation is multiplied by 3 and then 1 is added to each result, then the mean of the new observations so obtained is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 63
» Statistics & Probability
Question
A card is drawn from a packet of 100 cards numbered 50 to 150. The probability of drawing a number which is a square is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
