Question

the art club is sponsoring a four day art show. Their goal is for the average attendance to be between 100 and 120 inclusive. The attendance for the first three days of the show is 100, 105, and 91. what must be the attendance on the fourth day in order to achieve its goal?

Answer 1

Answer:
(100 + 105 + 91 + x ) / 4 = 100
100 + 105 + 91 + x = 400
296 + x = 400
x = 104