Geometry

Question Analysis  
This question involves the concept of complementary probability, where we calculate the probability of an event not occurring.
The main focus is to recognize that "not picking a white sock" is the complement of "picking a white sock," and use the formula .  

Key Concept Explanation  
Complementary probability states that the probability of an event not occurring is equal to 1 minus the probability of occurring.
For discrete events, this can also be calculated by counting outcomes that are not favorable to and dividing by the total number of outcomes.  

Step - by - Step Solution  
1. Total number of socks: .  
2. Number of white socks: .  
  .  
3. Complementary probability (not picking a white sock):  
 

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