A herd of cows contains 6 white, 4 red and 9 black cows. If 3 cows are drawn at random, the probability of selection cow from different colour is:

  • 1/51
  • 72/323
  • 17/51
  • none
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  • A herd of cows contains 6 white, 4 red and 9 black cows. If 3 cows are drawn at random, the probability of selection cow from different colour is:
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