Fred Has A bag Of Sweets:

Contents:
3 Yellow Sweets
5 Green Sweets
7 Red Sweets
4 Purple Sweets
1 Black Sweet

He Is Going To Take A Sweet From The Bag At Random,

a.) What is The Possibility That He Will Get A Black Sweet?

b.) Write The Missing Colour In The Sentence Below:

The Possibility Fred Will Get A ______ Sweet Is 1/4