Life Opportunities and Death OpportunitiesAccording to Dickson (2009), the function of survival is the basis in determining the chances of life and the chances of someone's death [8]. Let x be the age of someone who is still alive, with x ≥ 0. The life opportunity of someone who is x to t years can be denoted by t. So for the equality of life opportunities of people aged x to t years can be stated with: