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an urn contains 4 black balls and 6 white balls. a ball is picked at random, the colour is noted and it is replaced with two additional balls of different colours. In a pick of 3 without replacement, find the probability they the three ball are;
A. all white balls.
B. two white balls and one black ball.
C. at least one white ball​

Sagot :

B because it makes more sense
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