As we all know, fruits changes its color when it ripens. There are lot of fruits all over the world, but I just listed here the most common to people when you ask them the same question. Usually, they will give you a lot of fruits but as the survey says:
Banana. The most common fruit for all that changes color when it ripens. A banana before become ripe usually color green and when it ripens it will change its color to yellow. Usually, you can only eat a ripe banana but not the unripe one. Some people have their own dishes for the unripe one.
Apple. Just like the banana before it ripens, apples are color green if it is not ripe and become red color when it is ripe. Usually, a ripe apple are color red but there are 
also green apples that is also ripe in the right time but doesn’t changes its color.