Question 305305
The probability of drawing 1 spade is 13/52=1/4.
The probability of drawing the second spade (w/o replacement) is 12/51=4/17. 
The probabilities multiply to give P(2 spades)=(1/4)*(4/17)=1/17.
In terms of odds, probability gives favorable outcomes over total outcomes. 
Odds are given in terms of unfavorable outcomes to favorable outcomes.
Total outcomes=17
Favorable outcomes=1
Unfavorable outcomes=16
So the odds are 16 to 1 for drawing two successive spades.