A box contains 11 red balls and 7 white balls, if we consecutively pick two balls without replacement, what is the probability of getting one white and one red ball in total?
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this is ur answer. hope u understood
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probability of getting white ball=7/18
probability of getting red ball without replacement =11/17
adding two
(7/18)*(11/17)
=
probability of getting red ball without replacement =11/17
adding two
(7/18)*(11/17)
=
anuhoney:
I don't think about that case
Sry for that
can u plz explain about ur answer
u are drawing 4 balls right
take a look at my answer for this question. If u hav'nt understood, then I will xplain
in the question he asked to draw 2 balls but u are drawing 4 balls
how it is possible
In this answer I first considered situation of drawing 1 ball from red and then one ball from green. This is one possible case. Another case is drawing 1 ball from green and then one ball from red. Either of these cases were possible. So I used "+" between 2 cases.
I am considering any one of the cases from available 2 cases
thank u
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