Thursday

August 28, 2014

August 28, 2014

Posted by **gift onos** on Sunday, September 23, 2012 at 10:38pm.

- math -
**Reiny**, Sunday, September 23, 2012 at 11:12pmprob(defective) = 4/12 = 1/3

prob(not defective) = 2/3

1. all 3 defective ---- prob = (1/3)^3 = 1/27

2. at least 2 defective

----> 2 defective or 3 defective

prob = C(3,2)(1/3)^2 (2/3) + (1/3)^3

= 3(2/27) + 1/27 = 7/27

3. at most 2 ---> 0 defective, 1 defect, or 2 defective

or exclude all 3 defectiv

= 1 - 1/27 = 26/27

BTW,

Where do the bulbs enter the picture when talking about cell phones

**Related Questions**

finite math - a cellular phone manufacturer randomly selects 5 phones from every...

statistics - A cellular phone manufacturer randomly selects 5 phones from every ...

statistics - A cellular phone manufacturer randomly selects 5 phones from every ...

statistics - A manufacturer of cell phones has decided that an assembly line ...

Statistics - A box contains 12 lights bulbs, of which 4 are defective. All bulbs...

Math Probability - 5 selected from batch of 50 produced, if one is found ...

Statistics - 5 selected from batch of 50 produced, if one is found defective, ...

Probability Help!!! - 5 selected from batch of 50 produced, if one is found ...

Probability - 5 selected from batch of 50 produced, if one is found defective, ...

Algebra1 - A CELL PHONE ORDDERS 500 NEW PHONES FROM A MANFACTURE.IF THE ...