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Question

A bag contains 5 red and 7 black balls. If two balls are drawn successively without replacement, then the probability that the first one is red and the second is black is

A
25132
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B
35132
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C
35144
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D
30144
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Solution

The correct option is B 35132
Probability of getting red ball in first draw=512
Probability of getting black ball in second draw=711
So, required probability =512×711=35132

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