Q16. 
A set of cards bearing the number 200299 is used in a game. if a card is drawn at random, what is the probability that it is divisible by 3: 
A.  0.66 

B.  0.33 

C.  0.44 

D.  0.55 
Q18. 
A dice is rolled three times and the sum of the numbers appearing on the uppermost face is 15. The chance that the first roll was a four is: 
A.  2/5 

B.  1/5 

C.  1/6 

D.  None of these 
Q19. 
An antiaircraft gun can fire four shots at a time. If the probabilities of the first, second, third and the last shot hitting the enemy aircraft are 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an enemy aircraft will bring the aircraft down? 
A.  0.084 

B.  0.916 

C.  0.036 

D.  0.964 
Q20. 
Four different objects 1, 2, 3, 4 are distributed at random in four places marked 1, 2, 3, 4. What is the probability that none of the objects occupy the place corresponding to its number? 
A.  17/24 

B.  3/8 

C.  1/2 

D.  5/8 