1. The music hall has 20 boxes :
 => on thurs 2/5 were occupied
 => on friday 2/4 were occupied 
 => and on saturday 8/10 were occupied.
 Let’s find out which day has the most occupied space of the music hall.
 2/5 + 2/4 + 8/10 = 6/20 + 7/20 + 10/20
 Thurs 2/5 were occupied
 => 6/20 = 0.3
 => 20 * 0.3 = 6 boxes
 Friday 2/4 were occupied 
 => 7/20 = 0.35
 => 20 * 0.35 = 7 boxes
 Saturday 8/10 were occupied.
 => 10/20 = 0.5
 => 20 * .5 = 10 boxes
 Thus, during Saturday has the most number of occupied boxes.