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August 20, 2014

August 20, 2014

Posted by **puzzled** on Sunday, January 30, 2011 at 12:20am.

(a) A defective tape or a defective case.

p = .26

(b) A good tape or a good case.

p = ?

(c) A good tape and a good case.

p = .74

- MATH -
**Damon**, Sunday, January 30, 2011 at 2:22amOut of 100

10 have only broken tape

5 have only broken case

11 have both broken

so

26 have something broken

74 are whole

100 - 11 = 89 have a good case or a good tape (or both)

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