If mc005-1.jp g and mc005-2.jp g are inverse functions of each other and mc005-3.jp g, what is mc005-4.jp g? mc005-5.j pg mc005-6.jp g mc005-7.j pg mc005-8.jp g

List out the odd numbers: {1, 3, 5, 7}

List out the values that are 7, which is just the set { 7 }

Combine the two sets {1, 3, 5, 7} and { 7 } to get {1, 3, 5, 7}. No change happens with the first set because of the overlap. 

There are 4 items in the set {1,3, 5, 7} out of 7 items total {1,2, 3, 4, 5, 6, 7}

So the probability expressed as a fraction is 4/7
This is roughly approximate to 0.5714 (which is roughly 57.14%)