The odds of the ball landing on any single number are 37 to 1.
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In each revolution, the wheel would advance 2 x pi x radius. Multiply this by the number of revolutions.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. There s the same amount of each.
Answer 1) Because, odds with evens would be odd, so odds+odds=evens. Answer 2) Relating this to an example, if you want to add 5 + 7, you could take 1 off each of these odd numbers, making them even. Your equation will now be 4 + 6, but you also have to add 2 to you answer because of that's the amount you took off to make the numbers even. You equation will now be 4 + 6 + 2, which is 12. Sorry if this is confusing....
42/2pi is 6.68inches
42/2pi is 6.68 inch radius