If the Random Variable X Is Exponentially Distributed with Parameter $\lambda$

Short Answer

If the random variable X is exponentially distributed with parameter $\lambda$ = 4, then the probability P(X $\leq$ 0.25), up to 4 decimal places, is: $\begin{array}{|l|l|}\hline A&\text { 0.6321}\\\hline B&\text { 0.3679}\\\hline C&\text { 0.2500}\\\hline D&\text { None of these choices are correct.}\\\hline \end{array}$