amnazafar995
amnazafar995 amnazafar995
  • 02-04-2017
  • Mathematics
contestada

A machine produces a total of 12,000 bolts a day, which are on the average 3% defective. Find the probability that out of 600 bolts chosen at random, 12 will be defective.

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MLPshine
MLPshine MLPshine
  • 02-04-2017
12/600 will be equal to 2%.
You can check the answer this way:
2% of 600
2/100 × 600
Cut the '00' in 600 and 100...
2/1 × 6 
= 12
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