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The factory makes light bulbs the probability that a bulb is defective is 1/15 if 300 light bulbs are tested about how many are expected to be defective a 20 b 66 c 15 d 30
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5 votes
5 votes
The factory makes light bulbs the probability that a bulb is defective is 1/15 if 300 light bulbs are tested about how many are expected to be defective

a 20

b 66

c 15

d 30

User Adam Hopkinson
by
2.7k points

2 Answers

26 votes
26 votes
A) you can make a ratio of 1/15 = x/300

300x1 = 300

300/15 = 20
User Mortensen
by
3.0k points
21 votes
21 votes
defective : working = 1/15 ( x20 ) 20/300
so the answer is 20 light bulbs
User Yaakov Belch
by
2.9k points
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