  # A bag contain 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white?

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A bag contain 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white? posted Nov 17, 2015

n(S)=13C2=78
n(E)=5C2=10

Therefore
P(E)=n(E)/n(S)
=10/78
=5/39

Ans:Probability is 5/39 answer Nov 17, 2015

p(E)= 10/78

``````p(E)= 5c2 / 13c2 = 10/78
`````` answer Mar 14, 2016
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1 in 169... WAIT! it's... 1 in yeah answer Jun 28, 2016 by anonymous

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