Question

10)An urn contain 10 black and 10 white balls then the probability
of two balls of the same colour is........
A)8/19,
B)9/19, C)5/19, D) none of these​

Answer 1

Answer:

D) none other f these

Step-by-step explanation:

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Answer 2

Answer:

10C2+10C2/20C2

=45+45/190

=90/190

=9/19