3 Comments for A solid with 10 congruent faces is a decahedron. Shannon and Joshua roll a decahedron labelled 1 to 10. a> Wha?

• 1. terrapinsandjackals  |  November 13th, 2010 at 8:25 am

  Odd probability 5 out of 10 exactly the same as even probability. Joshua is telling porkies every number has the same probability of being rolled that is 1 chance in 10

• 2. Matt Watt  |  November 13th, 2010 at 9:08 am

  okay, here goes.

  as it is a ten sided die, and assuming all outcomes are equally likely, the chance of rolling anyy particular number is 1/10

  therefore, the probability that Shannon rolls an odd number (1,3,5,7,9) is 5/10 or 1/2

  The digits that come up on each roll are: 1,2,3,4,5,6,7,8,9,1,0 (10 is made up of 2 digits, 1 and 0)
  You have 2 chances of rolling a 1 and this would make the probability of rolling a 1 2/10 which is equal to 1/5

  hope this helps

  EDIT: it would not be a 2/10 chance of rolling a 1 as there are now 11 digits that could eventuate, 0-10.
  Part B does not work

• 3. toucando  |  November 13th, 2010 at 9:16 am

  a. 1/2
  b. 1 (1 and 10)

Leave a Comment for A solid with 10 congruent faces is a decahedron. Shannon and Joshua roll a decahedron labelled 1 to 10. a> Wha?

You must be logged in to post a comment.

Trackback this post  |  Subscribe to the comments via RSS Feed