Question

A quality control inspector finds 9 defective units in a sample of 60 cellular phone. At this ratio, how many units can the inspector expect to find in a batch of 3000 such phones?

Answer 1

The inspector can expect to find 450 units in a batch of 3000 phones

Step-by-step explanation:

Given

Total Cellular Phones = S = 60

Defective phones = E = 9

We will calculate the probability of defective forms first

So,

$P(d)=\frac{E}{S}\\=\frac{9}{60}\\=0.15$

The probability of defective phones in 60 phones is 0.15

Now,

Total phones = 3000

$P(d)=0.15*3000\\=450$

The inspector can expect to find 450 units in a batch of 3000 phones

Keywords: Probability, Experimental probability

Learn more about probability at:

• brainly.com/question/10364988
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