Results 1 to 2 of 2

Thread: ICAS problem

  1. #1
    New Member
    Join Date
    Jul 2016
    HSC
    N/A
    Gender
    Undisclosed
    Posts
    21
    Rep Power
    2

    ICAS problem

    Icas results are out online, and only 20% answered this problem, which seems relatively easy at first, correctly:

    Mary had 3 identical cubes. each cube has one pink face and one yellow face. the rest of the faces were blue. she joined the cubes as shown to form a solid (3 cubes connected in a line). what is the probability that the faces on the Bottom of the solid have 3 different colours.

    the first thing I thought was 3! x 1/6 x 1/6 x 4/6 = 1/9
    3! for the no. of ways the colours can be arranged
    1/6 for the probability that yellow and pink are at the bottom
    4/6 for the probability that blue is at the bottom.

    but the correct answer is 7/48 ?? an explanation would be greatly appreciated.

  2. #2
    New Member
    Join Date
    Sep 2017
    HSC
    N/A
    Gender
    Undisclosed
    Posts
    7
    Rep Power
    1

    Re: ICAS problem

    Yep 1/9 seems right.Could you post a png of the question and also the paper and the year thanks.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •