Q31. 
There are 6 positive and 8 negative numbers. Four numbers are chosen at random and multiplied. The probability that the product is a positive number is: 
A.  500/1001 

B.  503/1001 

C.  505/1001 

D.  101/1001 
Q32. 
A bag contains 2 red, 3 green and 2 blue balls are to be drawn randomly. What is the probability that the balls drawn contain no blue ball? 
A.  5/7 

B.  10/21 

C.  2/7 

D.  11/21 
Q33. 
A number is selected at random from first thirty natural numbers. What is the chance that it is a multiple of either 3 or 13? 
A.  17/30 

B.  2/5 

C.  11/30 

D.  4/15 