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A producer of electronic book readers is performing a quality check to ensure the reader's backlight is working correctly. The plant manager tests 2,000 readers on Monday and finds that 8 have defective backlights.

The fraction [tex][tex]$\frac{1}{x}$[/tex][/tex] is the experimental probability of a book reader having a defective backlight. What is the value of [tex][tex]$x$[/tex][/tex]?

A. 4
B. 8
C. 250


Sagot :

To determine the value of [tex]\( x \)[/tex] for which the fraction [tex]\( \frac{1}{x} \)[/tex] represents the experimental probability of a book reader having a defective backlight, we need to follow these steps:

1. Find the total number of readers tested and the number of defective readers:
- Total readers tested: 2000
- Defective readers: 8

2. Calculate the experimental probability as a fraction:
The experimental probability [tex]\( P \)[/tex] of a book reader being defective is given by:
[tex]\[ P = \frac{\text{Number of defective readers}}{\text{Total number of readers tested}} = \frac{8}{2000} \][/tex]

3. Simplify the fraction:
To find the value of [tex]\( P \)[/tex], we simplify the fraction:
[tex]\[ P = \frac{8}{2000} = \frac{1}{250} \][/tex]

4. Determine the value of [tex]\( x \)[/tex]:
Since [tex]\( P = \frac{1}{250} \)[/tex], it is clear that the experimental probability is represented by [tex]\( \frac{1}{x} \)[/tex] where [tex]\( x = 250 \)[/tex].

Thus, the value of [tex]\( x \)[/tex] is [tex]\( 250 \)[/tex].