3 years ago

What is number 9 I can't figure it out

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

5 0

The answer is 13/24 because if you divided 3/8 divided by 1/6 it will equal 13/24

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A sample of 4 different calculators is randomly selected from a group containing 14 that are defective and 34 that have no defec

marysya [2.9K]

Answer:

The answer is "0.7616".

Step-by-step explanation:

Using formula:

$\text{P( at least one de-fective) = 1 - P( all calculators work )}$

$= 1-(\frac{34}{48}\times \frac{33}{47}\times \frac{32}{46}\times \frac{31}{45})\\\\= 1-(\frac{34}{1}\times \frac{11}{47}\times \frac{1}{23}\times \frac{31}{45})\\\\=1-(\frac{11594}{48647})\\\\=\frac{48647-11594}{48647}\\\\=\frac{37051}{48647}\approx 0.7616$