JEE Math Practice Question
A bag contains 8 balls, whose colours are either white or black. 4 balls are drawn at random without replacement and it was found that 2 balls are white and other 2 balls are black. The probability that the bag contains equal number of white and black balls is :
- A.$\frac{2}{5}$
- B.$\frac{2}{7}$
- C.$\frac{1}{7}$
- D.$\frac{1}{5}$
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