Posted by **Anonymous** on Wednesday, March 27, 2013 at 3:05pm.

The squares of a 3×3 grid of unit squares are coloured randomly and independently so that each square gets one of 5 colours. Three points are then chosen uniformly at random from inside the grid. The probability that these points all have the same colours can be expressed as a/b, where a and b are coprime positive integers. What is the value of a+b?

## Answer This Question

## Related Questions

- MATH - A four by four grid of unit squares contains squares of various sizes (1 ...
- grid problem (geometry) - The squares of a 2×60 chessboard are coloured black ...
- Math - There is a 4 x 4 square grid. Two unit squares are chosen from the 16 ...
- Math - There is a 4 x 4 square grid. Two unit squares are chosen from the 16 ...
- Mathematics - The squares of a 2×60 chessboard are coloured black and white in ...
- Math (Probability) - Four players are playing a game involving choosing squares ...
- math problem - In a standard carnival game, you toss a coin on a table top ...
- Geometry - Let G be a rectangular grid of unit squares with 3 rows and 8 columns...
- maths - The squares of a 3×3 board are randomly coloured black or white. Let W ...
- maths - The squares of a 3×3 board are randomly coloured black or white. Let W ...

More Related Questions