SOLUTION: The probability of a driver under the age of 20 being involved in an accident is 15%. An insurance company records the number of teenage drivers it takes until one is involved in a

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Question 371326: The probability of a driver under the age of 20 being involved in an accident is 15%. An insurance company records the number of teenage drivers it takes until one is involved in an accident.
A) What is the probability that the company finds the first accident on the 4th driver?
B) What is the probability that it takes more than 5 teenage drivers to see the first accident.
C) What is the probability that it will take less than 4 drivers to see the first accident?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Geometric Probability Function = f(x)=p(1-p)^(x-1)
.
A).15(.85)^3=.0921
.
C)
1 driver .15
2 """""" .1275
3 """""" .1084
----------------add
=======>.3859
.
B)
.3859+.0921=.4780
1-.4780=.5220
.
Ed