Aman who is colour
blind marries a woman
who is a carrier for red
green blindness. what y
ĕ chances that their
sons will be colour blind

100 percent.

Explanation:

If both parties are colorblind in any way, then there is a 100 percent chance that the son will have at least one color that they can not see, or tell.  

by drinking easy

very easy

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.