Can someone me answer this question ?

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

The letter tiles shown below are in a bag. whiteout looking i am going to draw one tile. what are my chances of drawing g?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.