SOLUTION: If 10% of cars approaching an intersection leg turn left, what is the probability that at least one out of three cars chosen at random will turn left?

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Question 1206008: If 10% of cars approaching an intersection leg turn left, what is the probability that at least one out of three cars chosen at random will turn left?
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

this is a binomial distribution
given:


the probability that at least one out of three:

=
=
=
=


Answer by ikleyn(52803)   (Show Source): You can put this solution on YOUR website!
.
If 10% of cars approaching an intersection leg turn left, what is the probability
that at least one out of three cars chosen at random will turn left?
~~~~~~~~~~~~~~~~~~~~ 

Then the probability that NO ONE of three cars will turn left is   = 0.729.


Respectively, the probability that at least one of three cars will turn left is the complement to it

    P = 1 -  = 1 - 0.729 = 0.271.    ANSWER

Solved.



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