Statistics and Probability (IMO Mathematics Olympiad Class 9): Questions 62  69 of 101
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Question number: 62
» Statistics and Probability
Question
A card is drawn from a wellshuffled pack of 52 cards. The probability that the card drawn neither a club nor a spade is ________
Choices
Choice (4)  Response  

a. 


b.  2 

c.  3 

d. 


Passage
Cards marked with the number 5 to 104 are placed in a box and mixed thoroughly. One card is drawn from this box. Find the probability that the number on the card is
Question number: 63 (1 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
A prime number less than 30.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 64 (2 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
A number less than 21
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 65 (3 of 3 Based on Passage) Show Passage
» Statistics and Probability
Question
A number which is a perfect square
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 66
» Statistics and Probability
Question
Average of 15 numbers is 45. What should be added as 20^{th} number to make the average 60?
Choices
Choice (4)  Response  

a.  410 

b.  525 

c.  758 

d.  672 

Question number: 67
» Statistics and Probability
Question
One card is drawn from a wellshuffled deck of 52 cards. The probability of neither a heart nor a red king is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 68
» Statistics and Probability
Question
A die is thrown once. The probability of getting an odd number is ________
Choices
Choice (4)  Response  

a.  2 

b. 


c. 


d.  0 

Question number: 69
» Statistics and Probability
Question
The probability of guessing the correct answer to a certain test question is . If the probability of not guessing the correct answer to this question is , then x = ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  5 
