Posted by **Lisa** on Sunday, July 24, 2011 at 1:17pm.

A bag contains five pieces pf paper wit hthe emasures of various angles. The angle measures are 23,35,23,41,113. Suppose you pick 3 pieces of paper from the bag at random. What is the probability you can form an isosceles triangle with the three angles?

- Geometry -
**Reiny**, Sunday, July 24, 2011 at 1:57pm
There is only one pair of equal angles, so the number of triples which are isosceles is 3

that is, 23 23 35, 23 23 41, and 23 23 113

total number of triplets:

1. 23 not in the triple --- 1

2. one 23 --- choose 2 from the remaining 3 , C(3,2) = 3

3. two 23's --- 3

a total of 7

here they are

35 41 113

23 35 41, 23 35 113, 23 41 113

23 23 35, 23 23 41, 23 23 113

prob of your event = 3/7

- Geometry -
**Butch**, Sunday, July 24, 2011 at 2:15pm
Outstanding! Thanks!!

- Geometry -
**Lisa**, Sunday, July 24, 2011 at 2:23pm
Who is Butch?

- Geometry -
**Ms. Sue**, Sunday, July 24, 2011 at 2:39pm
Lisa, Butch -- you are the same person. Please don't play games with us.

- Geometry -
**Lisa**, Sunday, July 24, 2011 at 7:58pm
Hi Miss Sue, totally not playing. My husband and i are taking the same class, and asking the same questions. He just happened to repoy to mine. We appreciate all of your help. God Bless!

- Geometry -
**Justin**, Saturday, December 22, 2012 at 7:20pm
I have a question! Can someone please answer the same question but with the numbers 35, 56, 35, 84,110

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