Can some one check my answer for this problem please?

An ancient Roman coin is found and a curious anthropologist wishes to determine if the coin is fair— Fair meaning that when flipped, it has a 50% chance of landing one way or the other. The anthropologist flips the coin 100 times and the coin comes up heads 72 times. Do you believe the coin is fair? What range of results would you expect if the coin was indeed fair?
xProbability of head = 72/100=.72= 72%. So the coin is not fair.
How would i find out the range of results expected if the coin was fair

Question

Can some one check my answer for this problem please?

An ancient Roman coin is found and a curious anthropologist wishes to determine if the coin is fair— Fair meaning that when flipped, it has a 50% chance of landing one way or the other. The anthropologist flips the coin 100 times and the coin comes up heads 72 times. Do you believe the coin is fair? What range of results would you expect if the coin was indeed fair? 
xProbability of head = 72/100=.72= 72%. So the coin is not fair.
How would i find out the range of results expected if the coin was fair