Q22. 
From $6$ men and $4$ ladies, a committee of $5$ is to be formed. In how many ways can this be done, if the committee is to include at least one lady? 
A.  246 

B.  340 

C.  290 

D.  315 
Q23. 
A question paper consists of three sections $4,5$ and $6$ questions respectively. Attempting one question from each section is compulsory but a candidate need not attempt all the questions. In how many ways can a candidate attempt the questions? 
A.  $209$ 

B.  $(4!1)(5!1)(6!1)$ 

C.  $119$ 

D.  $29,295$ 
Q25. 
In a hockey championship, there are $153$ matches played. Every two team played one match with each other. The number of teams participating in the championship is: 
A.  $18$ 

B.  $19$ 

C.  $17$ 

D.  $16$ 