IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 428  433 of 968
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Question number: 428
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.  488  
b.  466  
c.  468  
d.  486 
Question number: 429
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: 430
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.  78.5  
b.  32.5  
c.  65.5  
d.  43.6 
Question number: 431
Question
Area of quadrilateral formed by the vertices is ________
Choices
Choice (4)  Response  

a.  310 sq. units  
b.  206 sq. units  
c.  289 sq. units  
d.  196 sq. units 
Question number: 432
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: 433
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. 
