James and John combine their friends lists.  James has 75 friends.  John has 3 times as many friends as James.  They share 25 friends.  How many people are on the combined list?
John has 75*3=<<75*3=225>>225 people on his friends list
So that means there are 225+75=<<225+75=300>>300 people on the list
So once you remove duplicates there are 300-25=<<300-25=275>>275 people
#### 275