In every side of the coin, there is a fifty fifty chance
of landing on the other side, so there is a probability of 0.50. In a deck of
cards, there are 52 cards with 26 clubs and another 26 for spades. So in every
random choice, there is a 1/26 probability of the card being chosen.
Explanation is 
in the file below
bit.ly/2X07dra
6 because 2 divided by 12 is 6
A = L * W
A = 50
L = 2W
50 = W(2W)
50 = 2W^2
50/2 = W^2
25 = W^2
sqrt 25 = W
5 = W
L = 2W
L = 2(5)
L = 10 <==length is 10 yd
