Statistics & Probability (IMO Mathematics Olympiad Class 10): Questions 69  74 of 79
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 699 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 350.00 or
Question number: 69
» Statistics & Probability
Question
Two dice are thrown simultaneously. The probability of getting a doublet or a total of 4 is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 70
» Statistics & Probability
Question
The king, queen and jack of Spades are removed from a deck of 52 playing cards and then wellshuffled. One card is selected from the remaining cards. The probability of getting a Spades is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 71
» Statistics & Probability
Question
The average of 15 results is 50. If the average of the first six results is 82 and that of the last six is 62, then the sixth result is ________
Choices
Choice (4)  Response  

a.  57  
b.  58  
c.  59  
d.  60 
Question number: 72
» Statistics & Probability
Question
The king, queen and jack of clubs are removed from a deck of 52 playing cards and then wellshuffled. One card is selected from the remaining cards. The probability of getting a ‘8’ of black color is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 73
» Statistics & Probability
Question
The mean of 10 observations is . if each observation is multiplied by 4, then what is the new mean?
Choices
Choice (4)  Response  

a.  50  
b.  70  
c.  30  
d.  60 
Question number: 74
» Statistics & Probability
Question
The mean of 9 observations is 36. If the mean of the first 5 observations is 32 and that of the last 5 observations is 39, then the fifth observation is ________
Choices
Choice (4)  Response  

a.  37  
b.  28  
c.  31  
d.  43 