whitingmadison whitingmadison
  • 22-04-2017
  • Mathematics
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A box contains 10 ​transistors, 3 of which are defective. If 3 are selected at​ random, find the probability that a. All are defective. b. None are defective.

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Roswalien
Roswalien Roswalien
  • 22-04-2017
3/10(2/9)(1/8)

3/10(3/9)(3/8)
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patmat patmat
  • 22-04-2017
a) 3/10 x 2/9 x 1/8= 1/120

b) 1-1/120=119/120
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