Answer this equation in average please:
Average
1. Anne has 40 stamps, Jun-Jun also has 40 stamps, while for Tony, her stamps are unknown. But the 3 children's average of stamps are 45 stamps. Find Tony's average amount of stamps. Guys pls answer! I just made up the question only to get an example of an answer. Please please! my exam's will start tomorrow in MATH! >O<


(also give a solution for me to get SOLUTION PLS!!!!!) :(