Physics
posted by Jessica .
If i have ten grains of sand on a flat, 8x8 chessboard, randomly distributed, what is the probabilty that all ten are on the same square?

The important thing is that the probability of a grain of sand to be one one square is equal.
Pr(on a particular square)=1/64
So if we put a grain on any one square, the next 9 have to be on that next square. The probability of that is
Pr(10 on same square)=1*(1/64)^9
which is exceedingly small.
Respond to this Question
Similar Questions

Algebra
In my history book the expression square root (with a 3 in the nook( around a square root of ten is given. It says it equals the square root of ten with 6 in the nook. However, I don't understand where the six came from. I thought … 
2nd grade
Math i have 7 ten rods and 3 units squares. i am playing Win A Flat, i rolled a 9. how many ten rodes do i have after the exchanges? 
physics
Grains of fine California beach sand are approximately spheres with an average radius of 50 and are made of silicon dioxide. A solid cube of silicon dioxide with a volume of 1.00 m has a mass of 2600 kg. What mass of sand grains would … 
math
Alieta was playing the "win a flat"game and had 7 ten rods and 3 unit squares. She rolled a 9. How many ten rods does she have after the exchanges are made? 
PHYSICS
Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.4 × 103 kg/m3. What mass of sand grains would have a total surface area … 
Probabilities
A queen on an English chessboard is able to attack in the same row, column and diagonal. The probability that 2 randomly placed queens on an 8 by 8 chessboard will be able to attack each other can be expressed as a/b , where a and … 
Physics
Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.4 × 10^3 kg/m3. What mass of sand grains would have a total surface area … 
Physics
Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.4 × 103 kg/m3. What mass of sand grains would have a total surface area … 
Math
if it takes 1 second to place a grain of rice on the chessboard, how long will it take to place all the grains on the chessboard for each reward? 
Eglish
1. When he was ten, he went abroad. 2. When he was ten years ago, he went abroad. 3. When he was ten years, he went abroad. 4. At the age of ten, he went abroad. 5. At age ten, he went abroad. 51. At aged ten, he went abroad. 6. At …