Geometry

Question Analysis
This question tests calculation of probability for mutually exclusive events (drawing marbles of different colors).

Key Concept Explanation
Mutually Exclusive Events: Drawing a white marble and drawing a red marble cannot occur simultaneously.
Probability Formula: P(A or B) = P(A) + P(B) when events are mutually exclusive.

Step-by-Step Solution
Total marbles = 4 (white) + 5 (black) + 1 (red) = 10
P(White) = 4/10 = 0.4
P(Red) = 1/10 = 0.1
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