Geometry

Question Analysis  
This question involves mutually exclusive events (drawing a heart or a spade cannot happen at the same time).
The main focus is on applying the addition rule for mutually exclusive events: .  

Key Concept Explanation  
Mutually exclusive events: Events that cannot occur simultaneously.  
Addition rule: For mutually exclusive events, the probability of either event occurring is the sum of their individual probabilities.  

Step-by-Step Solution  
1. Total number of cards = 52.  
2. Number of hearts = 13, so .  
3. Number of spades = 13, so .  
4. Since hearts and spades are mutually exclusive:  
 

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