indiawalker626 indiawalker626
  • 02-05-2018
  • Mathematics
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I need help with this question

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Аноним Аноним
  • 02-05-2018
4/8 is the prob of pb .  =1/2 right 
4/8 is the prob of 2 pb= 1/2

then just multiply 1/2 times 1/2 = 1/4
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