From 12,000 graphing calculators produced by a manufacturer, an inspector selects a random sample of 550 calculators and finds

Question

3 years ago

5

6 defective calculators. Estimate the total number of defective calculators out of the 12,000.

1 answer:

maria [59] · Answer 1 · 2022-01-30T06:00:00+03:00

maria [59]3 years ago

3 0

Answer:

131

Step-by-step explanation:

Using proportion,

If Out of 550 calculators = 6 are defective,

Then out of 12000 calculators = ? are defective

$\frac{12000 calculators}{550calculators} * 6$

= 21.8 * 6

= 130.8 ≈ 131

∴ Approximately 131 calculators are defective

From 12,000 graphing calculators produced by a​ manufacturer, an inspector selects a random sample of 550 calculators and finds