Question

the outcome of a random experiment results in either success or failure. if the probability of success is twice the probability of failure, then the probability of success is

Answer 1

let probability of outcome of success= x
probability of outcome of failure=2x
x+2x=1
3x=1
x=1/3

Answer 2

total no of possible outcome is 2 (success and failure)
let us take the probability of failure as x
$\frac{x}{2} + \frac{2x}{2} = 1 \\ x + 2x = 2 \\ 3x = 2 \\2 x = \frac{2}{3} \\ x = \frac{1}{3}$