Answer:
To start off those are horrible stats, 24 made out of 80, sooo sad :-(
Anyways for your answer you want to look at how many shot attemps
were made by all 3 players
Sue = 80
Janice = 35
Maria = 145
80 + 35 + 145 = 260
260 represent how many shots were taken altogether, which is very important.
From here calculate how many shots were made then divide total shots made with total shots taken.
Hope this helps :)