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

Multiple Choice

If the random variable x is exponentially distributed with parameter $\lambda$ = 1.5,then P(2 ? x ? 4) ,up to 4 decimal places,is:

A) 0.6667.
B) 0.0473.
C) 0.5000.
D) 0.2500.