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Of the individual machine operators who recorded a defective

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sandy
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Of the individual machine operators who recorded a defective [#permalink] New post   10 Oct 2018, 19:17
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Of the individual machine operators who recorded a defective part rate of 4.2%, approximately how many hours of experience did the least experienced operator have?

(A) 2,300
(B) 5,000
(C) 7,700
(D) 9,800
(E) 15,100
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C
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sandeep1995
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Re: Of the individual machine operators who recorded a defective [#permalink] New post   06 Apr 2020, 02:51
Can you please explain this. I need a different explanation than that of 5Lb.
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sukrut96
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Re: Of the individual machine operators who recorded a defective [#permalink] New post   06 Apr 2020, 03:22
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sandeep1995 wrote:
Can you please explain this. I need a different explanation than that of 5Lb.


In the graph above, it is given that defective parts per 1,000 and we need to find the experience of person who detects with 4.2% accuracy.
Thus 1,000*0.042 = 42. No look for the data point where 42 is, we can see that it is less than 8,000. Thus, option C is the correct answer.
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Ayammali602
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Re: Of the individual machine operators who recorded a defective [#permalink] New post   12 Nov 2023, 19:26
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ans:C, from the graph 4.2% X 1000= 42 ( no. of machines) so equal less than 8000
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