Question

x and y are two outcomes of event p(x) = 0.72 what will be p(y)

Answer 1

p(x)+p(y)=1 then p(y)=1-0.72=0.28 that is true answer

Answer 2

P(y)= 1-0.72=0.28
because if the probabilty of any thing is 1 that means 100 percent chance of happening here its is 0.72 so thats why we sbtracted it from 1