Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 46  51 of 79
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Question number: 46
» Statistics & Probability
Question
The average of 15 results is 50. If the average of the first seven results is 82 and that of the last seven is 92, then the seventh result is ________
Choices
Choice (4)  Response  

a.  468  
b.  488  
c.  466  
d.  486 
Question number: 47
» Statistics & Probability
Question
The average temperatures of Monday, Tuesday, Wednesday and Thursday was . The average temperature of Tuesday, Wednesday, Thursday and Friday was . If the temperature on Monday was , then the temperature on Friday was ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 48
» Statistics & Probability
Question
The mean of 50 observations is 44. By error, one observation was noted as was misread as 56. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  43.6  
b.  78.5  
c.  32.5  
d.  65.5 
Question number: 49
» Statistics & Probability
Question
Two dices are thrown simultaneously. The probability of getting a sum of 8 is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 50
» Statistics & Probability
Question
In a single throws of a die, the probability of getting a number is greater than 2 is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 51
» Statistics & Probability
Question
A bag contains Five green, four blue and Three orange marbles. If a marble is picked at random, then the probability that it is not an orange marble, is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
