Seismologists Have Discovered a Thermal Disturbance in a Remote Location

Multiple Choice

Seismologists have discovered a thermal disturbance in a remote location near the polar ice caps.Since the disturbance appears to occur randomly, they model the event using an exponential random variable X.If the mean time between occurrences is 52.25 hours, what is the probability that there will be at least 24 hours between occurrences?

A) 0.0190
B) 0.3683
C) 1.000
D) 0.6317