1. An advertising agency after surveying its clients found the proportion of clients who use TV, Radio, and Magazines. The proportion of TV, Radio, Magazines users is 61%, 67%, & 61% respectively. The proportion of clients using all the 3 services is 39%. The proportion of users using both TV &
2. Magazines is 44%, 50% of users use both Radio & Magazines, while 44% of users use both TV & Radio. 
3. 
   
4. Find the proportion of users who use at least 1 of the above 3 services.