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Probability
RD Sharma
CBSE
Grade 10
Question:
A bag contains $5$ red, $8$ green and $7$ white balls. A ball is drawn at random. The probability that the ball drawn is not white is: (a) $\dfrac{13}{20}$ (b) $\dfrac{7}{20}$ (c) $\dfrac{3}{5}$ (d) $\dfrac{2}{5}$
Step-by-Step Solution
Key Concept: Total balls $= 20$. Not white balls $= 5 + 8 = 13$. $P = \dfrac{13}{20}$.
$P = 13/20$. [1.0 Mark]
--- 🎯 Official CBSE Marking Scheme: Evaluating $13/20$: 1.0 Mark
Correct Answer:$\dfrac{13}{20}$
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