Question 1206781
{{{lambda=1}}}

{{{x=1.2}}}

Mean: 

{{{mu=1/lambda=1/1=1}}}

Variance: 

{{{sigma^2=1/lambda^2=1}}}


{{{P(x < 1.2)= highlight(1-e^(-1.2/1)) =highlight(0.6988)}}}