How can all 3 of these be true? 
*

*Most numbers are composite.

*If you choose a random whole number there is a 50/50 chance that it's even or odd.

*If you take 2 random whole numbers and multiply them there is a 75% chance the result is even and a 25% chance it is odd.
(That is even*even=even, odd*even=even, even*odd=even, and only odd*odd=odd)


How can all 3 of these be true?

You're question #3 almost answer themselves, if there are 4 possible options, and 3 out of 4 of the possible options give us an even product, than there is a 75% chance the product is even and a 25% chance that the product is odd. The first 2 questions are general proporties which can be shown by taking any 2 consecutive numbers as examples
