IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 626  631 of 929
Access detailed explanations (illustrated with images and videos) to 929 questions. Access all new questions we will add tracking exampattern and syllabus changes. Unlimited Access for Unlimited Time!
View Sample Explanation or View Features.
Rs. 450.00 or
How to register?
Question number: 626
Question
The average of 12 students is 15. The marks of a student who scored zero were wrongly taken as 18 and average was determined. The correct average marks is________
Choices
Choice (4)  Response  

a.  12  
b.  15  
c.  13.5  
d.  14.5 
Question number: 627
Question
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 628
Question
The average weight of the students of a class is 30 kg. 3 new students with the average weight of 36 kg. Having joined the class, the average weight of the class is increased by 3 kg. Find the number of students in the class originally?
Choices
Choice (4)  Response  

a.  5  
b.  4  
c.  6  
d.  3 
Question number: 629
Question
The mean, median and mode of the following numbers
12,24,12,23,24,22,25,26,25,26,26,28,25,22,26,28,29,30,11,12 are________
Choices
Choice (4)  Response  

a.  22,26,25  
b.  26,25,22  
c.  22.8,25,26  
d.  25,22,25 
Question number: 630
Question
Mean of 11 observations is 17.50, if one observation value 15 is deleted. The mean of remaining observations is ________
Choices
Choice (4)  Response  

a.  15.75  
b.  17.75  
c.  16.75  
d.  18.75 
Question number: 631
» Analytical Reasoning and Logical Reasoning
Question
Two cars start from opposite places on a main road, 150 km apart. First car runs for 25 km and takes a right turn and then runs 15 km. it then turns left and runs for another 25 km and then takes the direction to reach the main road. In the meantime, due to minor break down the other car has run only 35 km along the main road. What would be the distance between the two cars at this point?
Choices
Choice (4)  Response  

a.  85 km  
b.  75 km  
c.  80 km  
d.  65 km 