Geometry

Question Analysis
This question tests the understanding of probability by considering a set of numbered cards.
The main focus is on identifying the total number of cards and the number of cards with numbers less than 4 to apply the probability formula correctly.

Key Concept Explanation
Probability helps us quantify the chance of an event. In this case, the event is picking a card with a number less than 4, and we find its probability by comparing the number of such cards to the total number of cards in the deck.

Step - by - Step Solution
Determine the total number of cards in the deck, which is 10.
Identify the numbers less than 4 on the cards, which are 1, 2, and 3. So, the number of favorable outcomes is 3.
Apply the probability formula:

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