Help me out with my math exam
09-22-2014
, 04:06 AM
So I had my math exam today about probability. The last exercise was this:
If pieces A and B are put randomly on a chess board, what's the probability that the squares they are in touch each other.
I assumed that the touching means that the squares contact each other diagonally or that they are next to each other.
My solution:
(4/64)*(3/64)+(24/64)*(5/64)+(36/64)*(8/64)=0,10253...
It really bothers my that did I calculate this correctly, please help me
If pieces A and B are put randomly on a chess board, what's the probability that the squares they are in touch each other.
I assumed that the touching means that the squares contact each other diagonally or that they are next to each other.
My solution:
(4/64)*(3/64)+(24/64)*(5/64)+(36/64)*(8/64)=0,10253...
It really bothers my that did I calculate this correctly, please help me
09-22-2014
, 03:17 PM
Quote:
So I had my math exam today about probability. The last exercise was this:
If pieces A and B are put randomly on a chess board, what's the probability that the squares they are in touch each other.
I assumed that the touching means that the squares contact each other diagonally or that they are next to each other.
My solution:
(4/64)*(3/64)+(24/64)*(5/64)+(36/64)*(8/64)=0,10253...
It really bothers my that did I calculate this correctly, please help me
If pieces A and B are put randomly on a chess board, what's the probability that the squares they are in touch each other.
I assumed that the touching means that the squares contact each other diagonally or that they are next to each other.
My solution:
(4/64)*(3/64)+(24/64)*(5/64)+(36/64)*(8/64)=0,10253...
It really bothers my that did I calculate this correctly, please help me
or more simply: (4*3 + 24*5 + 36*8)/P(64,2) ≈ 10.4167%
Last edited by R Gibert; 09-22-2014 at 03:37 PM.
09-22-2014
, 05:08 PM
just curious to know what's the answer, since we get them back only after a few weeks.Why does the 2nd piece only have 63 squares available, I kinda thought that you would just randomly put the piece anywhere so it could technically go in the same square as the 1st piece. I did not count that as "touching" though
09-22-2014
, 06:40 PM
Quote:
Ye I did it today, didn't cheat just curious to know what's the answer, since we get them back only after a few weeks.
Why does the 2nd piece only have 63 squares available, I kinda thought that you would just randomly put the piece anywhere so it could technically go in the same square as the 1st piece. I did not count that as "touching" though
just curious to know what's the answer, since we get them back only after a few weeks.Why does the 2nd piece only have 63 squares available, I kinda thought that you would just randomly put the piece anywhere so it could technically go in the same square as the 1st piece. I did not count that as "touching" though
When you ask him/her for the partial credit, make sure you've practiced your pathetic look in the mirror. Every little bit can help. In my own case, I would not need to practice. I'm a "natural"
