Geometry

Question Analysis
This question is about calculating the probability of selecting a specific item from a set.
The main focus is on determining the total number of stickers and the number of heart - shaped stickers to apply the probability formula correctly.

Key Concept Explanation
Probability measures the likelihood of an event.
In this case, the event is picking a sticker with a heart, and we calculate its probability by comparing the number of heart - shaped stickers to the total number of stickers in the box.

Step - by - Step Solution
Calculate the total number of stickers in the box, which is 10.
The number of favorable outcomes (picking a heart - shaped sticker) is 4.
Apply the probability formula:

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