SOLUTION: box 1 contains 30 red balls and 70 white balls, box 2 contains 50 red balls and 50 white balls , box 3 contains 75 red balls and 25 red balls the three boxes are all emptied into a

Question 1195462: box 1 contains 30 red balls and 70 white balls, box 2 contains 50 red balls and 50 white balls , box 3 contains 75 red balls and 25 red balls the three boxes are all emptied into a large box and a ball is selected at random .if the selected ball is red what is the probability that it came from box 2?
Answer by ikleyn(52778) (Show Source): You can put this solution on YOUR website!
.
box 1 contains 30 red balls and 70 white balls,
box 2 contains 50 red balls and 50 white balls ,
box 3 contains 75 red balls and 25 red balls
the three boxes are all emptied into a large box and a ball is selected at random .
if the selected ball is red what is the probability that it came from box 2?
~~~~~~~~~~~~~~~~~~~

In all, there are 30+50+75 = 155 red balls in the large box.


Of them, 50 red balls came from box 2.


Therefore, if the selected ball is red, the probability that it came from box 2 is  

     = .    ANSWER

Solved.

Thank you for asking.

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