A fair coin is tossed until a head appears. What is the probability that more than three tosses are necessary?

Solution :

A fair coin tossed until a head appears.

Our goal is to find

a). What is the probability that more than three tosses necessary?

Step 1 of 1 :

Now we have to find the probability that more than three tosses necessary.

Here X is the number of tosses.

The formula of the probability is

After getting the the probability that more than three tosses.

P(more than three tosses)

P(more than three tosses)

Therefore the probability of that more than three tosses is.