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. are the two events independent?

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

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

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