How many seeds does a grape have?
Grapes sometimes have 1 seed sometimes have more. But most likey will have one.
Why do the seeds of the grapes have a higher chance of growing into healthier plants than that of the mango?
There are 60 metric drops in a 5ml teaspoon. You'll find many variants on this ranging from 50 - 120, but 60 is a good bet. [From Wiki Answers] 48 teaspoons in a cup. 48 x 60 = 2880 drops in a cup. A grape seed is about the size of a drop, but the oil inside the seed is probably a lot less than a drop. I don't know for sure how much oil…