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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