Question:
An urn contains 4 black, 5 white and 6 red balls. One ball is drawn at random. The probability that it is not black is
An urn contains 4 black, 5 white and 6 red balls. One ball is drawn at random. The probability that it is not black is
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"Not" questions are easiest using complement directly.
Updated On: Apr 30, 2026
- $\frac{4}{15}$
- $\frac{9}{15}$
- $\frac{11}{15}$
- $\frac{13}{15}$
- $\frac{14}{15}$
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The Correct Option is C
Solution and Explanation
Step 1: Total balls \[ 4 + 5 + 6 = 15 \]
Step 2: Balls that are NOT black \[ 5 + 6 = 11 \]
Step 3: Probability \[ P = \frac{11}{15} \] \[ \boxed{\frac{11}{15}} \]
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