contestada

factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many are expected to be defective?A) 14B) 371C) 29D)35

Respuesta :

To be able to determine how many batteries are expected to be defective, we will be applying ratios and proportions:

[tex]\text{ }\frac{1}{14}\text{ = }\frac{x}{400}[/tex]

Where,

x = the number of batteries expected to be defective

We get,

[tex]\text{ }\frac{1}{14}\text{ = }\frac{x}{400}[/tex][tex]\text{ }\frac{1\text{ x 400}}{14}\text{ = }x[/tex][tex]\text{ }\frac{400}{14}\text{ = x}[/tex][tex]28.57142857142857\text{ = x}[/tex][tex]\text{ 29 }\approx\text{ x}[/tex]

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