This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Answer
Step 1: Determine the total number of marbles in the bag. There are 3 black marbles and 1 white marble. Total number of marbles .
Step 2: Identify the number of favorable outcomes (black marbles). Number of black marbles .
Step 3: Calculate the probability of drawing a black marble. The probability is the ratio of the number of black marbles to the total number of marbles.
The probability that the marble drawn is black is .
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Determine the total number of marbles in the bag. There are 3 black marbles and 1 white marble.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.