Q46. 
In how many ways can 3 men and their wives be made stand in a line such that none of the 3 men stand in a position that is ahead of his wife? 
A.  $\dfrac{6!}{3! × 3! × 3!}$ 

B.  $\dfrac{6!}{2! × 2!}$ 

C.  $\dfrac{6!}{2! × 2! × 2!}$ 

D.  $\dfrac{6!}{2! × 3!}$ 
Q47. 
In a cricket match if a batsman score $0,1,2,3,4$ or $6$ runs of a ball, then find the number or different sequences in which he can score exactly 30 runs of an over. Assume that an over consists of only 6 balls and there were no extra and no run outs. 
A.  86 

B.  71 

C.  56 

D.  65 
Q49. 
How many numbers are there between 100 and 1000 such that at least one of their digits is 6? 
A.  200 

B.  225 

C.  252 

D.  120 
Q50. 
A student is required to answer 6 out of 10 questions divided into two groups each containing 5 questions. He is not permitted to attempt more than 4 from each group. In how many ways can he make the choice? 
A.  210 

B.  150 

C.  100 

D.  200 