7. Five marks exercise problems V

1. In a class, all students take part in either music or drama or both. \(25\) students take part
in music, \(30\) students take part in drama and \(8\) students take part in both music and
drama. Find:

 

(i) The number of students who take part in only music.

 

 

(ii) The number of students who take part in only drama.

 

 

(iii) The total number of students in the class.

 

 

 

2. In a Mathematics class, \(20\) children forgot to bring their rulers, \(17\) children forgot to
bring their pencils and \(5\) children forgot to bring both ruler and pencil. Then find the
number of children

 

(i) who forgot to bring only pencil

 

 

(ii) who forgot to bring only ruler

 

 

(iii) in the class.