Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 19  24 of 79
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Question number: 19
» Statistics & Probability
Question
A bag contains 5 Green, 4 Aqua, 9 Blue and 6 purple marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is Aqua or Purple, is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 20
» Statistics & Probability
Question
In a single throws of a die, the probability of getting a multiple of 3 is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 21
» Statistics & Probability
Question
If occur with frequencies respectively, then the arithmetic mean is ________
Choices
Choice (4)  Response  

a.  125  
b.  111  
c.  120  
d.  115 
Question number: 22
» Statistics & Probability
Question
The mean of 11 observations is 30. If the mean of the first 6 observations is 40 and that of the last 6 observations is 44, then the Sixth observation is ________
Choices
Choice (4)  Response  

a.  174  
b.  128  
c.  137  
d.  131 
Question number: 23
» Statistics & Probability
Question
The mean weight of a class of 24 students is kg. if the weight of the teacher is included, the mean rises by 400 g. Then the weight of the teacher is ________
Choices
Choice (4)  Response  

a.  55 kg  
b.  45 kg  
c.  65 kg  
d.  50 kg 
Question number: 24
» 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. 
