Statistics and Probability (KVPY Stream SBSX (Class 12 & 1st Year B.Sc.) Math): Questions 7  9 of 9
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Question number: 7
» Statistics and Probability » Probability
Appeared in Year: 2013
Question
A box contains coupons labeled . A coupon is picked at random and the number is noted. The coupon is put back into the box and a new coupon is picked at random. The new number is . Then the probability that one of the numbers divides the other is (in the options below denotes the largest integer less than or equal to ) (Model Paper)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 8
» Statistics and Probability » Probability of an Event
Appeared in Year: 2015
Question
Let and let a subset of be chosen so that every pair of elements of A differ by at least 3. (For example, if , A can be , {2} or {1, 5} among others). When let the probability that be and let the probability that be . Then –
Choices
Choice (4)  Response  

a.  and 

b.  and 

c.  and 

d.  and 

Question number: 9
» Statistics and Probability » Probability of an Event
Appeared in Year: 2016
Question
A box contains blue balls and red balls. A ball is drawn randomly from the box and is returned to the box with another ball of the same color. The probability that the second ball drawn from the box is blue is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

