Q:
A bag contains 12 white and 18 black balls. Two balls are drawn in succession without replacement. What is the probability that first is white and second is black?
Answer & Explanation
Answer: B) 36/145
Explanation:
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The probability that first ball is white: =C112C130=1230=25
Since, the ball is not replaced; hence the number of balls left in bag is 29. Hence the probability the second ball is black: =C118C129=1829
Required probability =(25)×(1829)
=36/145
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