IMO Mathematics Olympiad Class 10: Questions 342  346 of 908
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Question number: 342
Question
A Jar contains 20 marbles of two different colours, out of which x are Blue. One Marble is drawn at random. If 10 more blue marbles are put in the jar, the probability of drawing a blue marbles now will be double that of the previous probability of drawing a blue marbles. Then, the value of x is ________
Choices
Choice (4)  Response  

a.  5 

b.  8 

c.  2 

d.  9 

Question number: 343
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 club is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 344
Question
When two dice are thrown, the probability of getting a number always greater than 4 on the second dice is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 345
Question
In a , coordinates of A are and the equations of the medians through B and C are and respectively, so the coordinates of B and C are ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 346
Question
Two dices are thrown simultaneously. The probability of getting sum of atleast 11 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

