Geometry

Question Analysis
This question tests the understanding of complementary probability in a toy - selection scenario.
The main focus is on correctly calculating the probability of the complementary event of getting a doll.

Key Concept Explanation
The probability of an event not happening is related to the probability of the event itself.
The formula helps in quickly finding the probability of the non - occurrence of an event.
In terms of counting, we can also find the number of outcomes that are not part of event and divide by the total number of outcomes.

Step - by - Step Solution
Find the total number of toys in the box, which is 20.
Determine the number of dolls, which is 6. So, .
Calculate the probability of not getting a doll:
Method 1: Using the formula

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