Q6. 
One hundred identical coins each with probability '$p$' showing up heads and tossed If $0<p<1$ and the probability of heads showing on 50 coins is equal to that of heads on 51 coins, then the value of $p$ is: 
A.  1/2 

B.  49/101 

C.  50/101 

D.  51/101 
Q7. 
What is the probability that a two digit number selected at random will be a multiple of '3' and not a multiple of '5'? 
A.  2/15 

B.  4/15 

C.  1/15 

D.  4/90 
Q8. 
In his wardrobe, Dexter has three trousers. One of them is black the second is blue, and the third brown. In his wardrobe, he also has four shirts. One of them is black and the other 3 are white. He opens his wardrobe in the dark and picks out one shirt and one trouser pair without examining the colour. What is the likelihood that neither the shirt nor the trouser is black? 
A.  1/12 

B.  1/6 

C.  1/4 

D.  1/2 
Q9. 
A man can hit a target once in 4 shots. If he fires 4 shots in succession, what is the probability that he will hit his target? 
A.  1 

B.  1/256 

C.  81/256 

D.  175/256 