a company orders supplies from 10 distributor and wishes to place 7 orders. what is the probability that
a. all the orders go to different distributors
b. distributor 1 gets 2 orders and distributor 2 gets 3 orders
c. distributor 1,2,3 gets 2,3,1 orders respectively?
sorry, im really bad at probability...not sure how to approach such questions..
thanks!
Am I correct in inferring from that cryptic ‘though’ that you did not work out the suggested answered? Had you put just a little effort into what is after all your assignment, you would have seen that the answers given by the text are exactly the same as those I posted.
Until you show some effort on you part, do not expect any more help from me.
You can start by working on part c). You know the correct answer, so how is gotten?
im so sorry.
for part (a) i punched in 10! / 3! = 604800. i assumed that when you meant that the answer for part (a) is as follows...that it was the answer. i didnt know that i have to divide it by 10^7. so so sorry...
this also happened for the second part of the question.
for part (c) (7 choose 2 ) x ( 5 choose 3) x( 2 choose 1 ) x 7 / 10^7