Answer with Step-by-step explanation:
The events A and B are called independent if:
P(A∩B)=P(A)×P(B)
We are given that:
This week in school, there is a 75 percent probability of having a fire drill,
a 50 percent probability of a tornado drill,
and a 25 percent probability of having both drills.
Let event F be a fire drill and event T be a tornado drill.
P(F)=0.75
P(T)=0.50
P(F∩T)=0.25
P(F)×P(T)=0.375≠P(F∩T)
Hence, events F and T are not independent