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A dump of our free Chat sessions, in case it is useful. It excludes white boards used during paid sessions.





tutor2 : Hello Student, May I help you with your Math problems?
student : The probabilities are 0.4, 0.2, 0.3, and 0.1, respectively,
that a delegate to a certain convention arrived
by air, bus. automobile, or train. What is the
probability that among 9 delegates randomly selected
at this convention, 3 arrived by air, 3 arrived by bus,
1 arrived by automobile, and 2 arrived by train?
tutor2 : pls. wait.
student : ok, i just wait hurry up
tutor2 : the required probability =( 9!/3!*3!*1!*2!)*(0.4)^3*(0.2)^3*(0.3)^1*(0.1)^2
tutor2 : ( 9!/(3!*3!*1!*2!))*(0.4)^3*(0.2)^3*(0.3)^1*(0.1)^2
tutor2 : = 0.0077
tutor2 : (Ans.)
student : that's enough?
tutor2 : yes.
student : thanks
tutor2 : Please note, due to lack of resources, we can only do 1 problem FREE in 24 hours period. You can always come back tomorrow for another free problem. Please, tell your friends about our free service - 1 free in 24 hours
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student : assuming that 6 in 10 automobile are due mainly to a speed violation ,find the probability that among 8 automobile accidents 6 will be due mainly to a speed violation
a)by using the formula for the binomial cdistrbution
b) by using the binomial table ..how about this?
tutor2 : we do only one free per day.
student : ok i understand.. by the way thank you..please can you answer my last question?
tutor2 : no. sorrry. pls. send the problems we will sent quotes.
tutor2 : email at tutor@aafter.com
student : assuming that 6 in 10 automobile are due mainly to a speed violation ,find the probability that among 8 automobile accidents 6 will be due mainly to a speed violation
a)by using the formula for the binomial cdistrbution
b) by using the binomial table
tutor2 : Please note, due to lack of resources, we can only do 1 problem FREE in 24 hours period. You can always come back tomorrow for another free problem. Please, tell your friends about our free service - 1 free in 24 hours
tutor2 : pls. email.
student : what do you mean , i sign up?


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