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Eduncle Asked an Mcq
December 24, 2019 3:18 pm
  • CSIR NET
  • Physical Sciences

12 balls, 3 each of the colours red, green, blue and yellow are put in a box and mixed. If 3 balls are picked at random, without replacement, the probability that all 3 balls are of the same colour

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  • Eduncle Best Answer

    The probability that 1st ball is of 1 colour = 3/12 
    2nd ball also of same colour without replacement = 2/11
    3rd ball of same colour without replacement = 1/1...

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